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In years past I dealt with gm original throttle cables. current car has mechanical linkage.
How do I switch to cable. I get the pedal and cable. Will the cable go thru a pre existing hole? Hard drill with engine in car. Currently have a carbed ls engine. Metal linkage hits back of motor. I can use it but can’t get full throttle. I am hoping all holes are already in car?
 

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Thx, maybe I asked wrong. I know what I can use. Need know if cable holes are already in firewall? Do I have drill? Engine is in the car. Hard to drill firewall if engine is in the way.
did gm pre drill at factory?
 

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Thx, maybe I asked wrong. I know what I can use. Need know if cable holes are already in firewall? Do I have drill? Engine is in the car. Hard to drill firewall if engine is in the way.
did gm pre drill at factory?
You will have to drill if you use the 6 cylinder setup. I can upload pictures of mine if you need it.
 

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I have a SBC engine with an intake that is taller than stock in my car. I had to bend the pedal to carb rod to get clearance for full throttle. Is it possible you can put a bend in the rod and re-adjust so that it clears? If it is hitting on the intake this should work, just make sure when you bend the rod it doesn't hit the bottom of the air cleaner. Sounds like the easiest way out... I have zero experience with a LS swap, so maybe not. Picture would help.
 

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I had the same issue, LS close to firewall and linkage hitting everything. I have a lot of wiring and hoses that were running around the linage so that I was worried things would bind. I also realized that I could not get full throttle because of the limited space. Using a angled drill I was able to drill from inside the car. I will say that it is very important to make sure the hole you drill is directly in front of the attachment point of you pedal. If not, the cable will wear quickly and throttle movement will not be smooth. Also try to have as few bends in the cable as possible.
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If I remember correctly, mine was not there but there was a dimple in the firewall. I think that is to mark where to drill from the factory. Be careful though, there are a couple dimples so drill the best one that fits.
 

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Thx that helps. I will be using 6 cyl pedal. Hopefully orig style cable. I was wondering where to drill the hole or is it already there or marked from factory?
If you need more, let me know.
 

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Discussion Starter · #16 ·
The second pic where cable comes thru firewall. I can see the screw also. Were the holes predrilled? Pedal install is easy enough. Just wondering if once pedal is installed if it’s obvious. Where the hole needs to be? Since engine is installed I need drill from inside the car.
 

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The second pic where cable comes thru firewall. I can see the screw also. Were the holes predrilled? Pedal install is easy enough. Just wondering if once pedal is installed if it’s obvious. Where the hole needs to be? Since engine is installed I need drill from inside the car.
I’ll try to get better pictures tomorrow…daylight usually works. I believe there are dimples already there, so see your firewall.
 

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68 Base Camaro, 355 Offy crossram, Richmond Street close ratio 5 spd, 92K SoCal car
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Melmount others have already posted some good info and pics. A few more along the same line and things I learned in my crossram conversion may help. If your car came originally with a 6 cylinder the 2 holes are drilled (1 hole for cable guide, 1 hole to attach guide to firewall) and the black plastic guide and attaching screw may still be there, but they come as part of the factory cable setups bc the cable is installed through the guide and terminating metal crimp is swedged on. That swedged termination crimp is fed through the 6 cyl pedal upper hole and a plastic ring is placed on the cable end via a slot cut in ring, then the ring is press fit into the 6 cyl pedal assembly. The dimples should be on your firewall to drill the holes. Either use a tight clearance Blue Point or similar angle drill adapter from the engine bay, or locate the dimples inside cabin on firewall, center punch them so drill stays put bc the dimple is now pointing at you and drill. A few pics may help, sorry some aren't the best.

I prefer the mechanical factory linkage but on my crossram setup had no choice bc like the LS the crossram sits too far back to use anything other than the cable. The factory cable setup is somewhat rinky-dink and I may look to change to lockar cable set up. The plastic ring that holds the cable end in the 6 cyl pedal broke after the first few pedal movements, despite my cable moving free and easy. I purchased another brand of ring, same design different color and material not as brittle, it has been fine, it is white in color, I would not use the black ones that is what broke. Still carry a small vise grip so I can drive home should another plastic ring break, got to be a better set up.

6 cyl/crossram cable guide & bolt at firewall below wiper motor
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6 cyl/crossram throttle pedal mounts in same firewall plastic hinge as standard pedal assy. Note the upper part of assy where white plastic ring is slotted to allow cable end to slide into it and retains cable when ring is snap fit into pedal assy.
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Another pic showing the cable routing as it exits firewall.
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NOT the 6 cylinder pedal you want. This was sold to me as a 6 cyl/crossram pedal assy, it obviously is not, upper piece is wrong. People and major trusted vendors will rip you off all day long listing anything they can as a crossram part, be careful, know what you are buying.
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The cable guide and firewall attach bolt from inside car. Note if you locate the firewall jute insulation pad large rubber retainer to the left you are close.
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Heartbeat City sold me this as a crossram throttle cable, it is not. It is a common Chevrolet, Chevelle, Nova maybe others, cable for a single carb motor. Uses same firewall guide location and the bracket mounts to rear driver side carb to intake bolt. May or may not work for your application, not sure.
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6 cyl/crossram firewall info.
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Sheet 1
1/2" hole for guide, 3/16" for bolt, they are dimpled or holes already if 6 cyl car.
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The second pic where cable comes thru firewall. I can see the screw also. Were the holes predrilled? Pedal install is easy enough. Just wondering if once pedal is installed if it’s obvious. Where the hole needs to be? Since engine is installed I need drill from inside the car.
This should help…see dimples in the firewall. It has its own recessed area.
 

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Melmount others have already posted some good info and pics. A few more along the same line and things I learned in my crossram conversion may help. If your car came originally with a 6 cylinder the 2 holes are drilled (1 hole for cable guide, 1 hole to attach guide to firewall) and the black plastic guide and attaching screw may still be there, but they come as part of the factory cable setups bc the cable is installed through the guide and terminating metal crimp is swedged on. That swedged termination crimp is fed through the 6 cyl pedal upper hole and a plastic ring is placed on the cable end via a slot cut in ring, then the ring is press fit into the 6 cyl pedal assembly. The dimples should be on your firewall to drill the holes. Either use a tight clearance Blue Point or similar angle drill adapter from the engine bay, or locate the dimples inside cabin on firewall, center punch them so drill stays put bc the dimple is now pointing at you and drill. A few pics may help, sorry some aren't the best.

I prefer the mechanical factory linkage but on my crossram setup had no choice bc like the LS the crossram sits too far back to use anything other than the cable. The factory cable setup is somewhat rinky-dink and I may look to change to lockar cable set up. The plastic ring that holds the cable end in the 6 cyl pedal broke after the first few pedal movements, despite my cable moving free and easy. I purchased another brand of ring, same design different color and material not as brittle, it has been fine, it is white in color, I would not use the black ones that is what broke. Still carry a small vise grip so I can drive home should another plastic ring break, got to be a better set up.

6 cyl/crossram cable guide & bolt at firewall below wiper motor
View attachment 303806

6 cyl/crossram throttle pedal mounts in same firewall plastic hinge as standard pedal assy. Note the upper part of assy where white plastic ring is slotted to allow cable end to slide into it and retains cable when ring is snap fit into pedal assy.
View attachment 303802

Another pic showing the cable routing as it exits firewall.
View attachment 303803

NOT the 6 cylinder pedal you want. This was sold to me as a 6 cyl/crossram pedal assy, it obviously is not, upper piece is wrong. People and major trusted vendors will rip you off all day long listing anything they can as a crossram part, be careful, know what you are buying.
View attachment 303805

The cable guide and firewall attach bolt from inside car. Note if you locate the firewall jute insulation pad large rubber retainer to the left you are close.
View attachment 303804

Heartbeat City sold me this as a crossram throttle cable, it is not. It is a common Chevrolet, Chevelle, Nova maybe others, cable for a single carb motor. Uses same firewall guide location and the bracket mounts to rear driver side carb to intake bolt. May or may not work for your application, not sure.
View attachment 303800

6 cyl/crossram firewall info.
View attachment 303798

Sheet 1
1/2" hole for guide, 3/16" for bolt, they are dimpled or holes already if 6 cyl car. View attachment 303807
The cable is the service replacement that’s been in use for 25+ years.
 
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