6 cylinder to SBC swap - Team Camaro Tech
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post #1 of 5 (permalink) Old Dec 21st, 00, 04:13 PM Thread Starter
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Join Date: Dec 2000
Location: Kentwood, MI
Posts: 8,097

Just purchased a low mileage (71,000) 68 base model Camaro with the 250 six banger and powerglide last summer. I have already put in the larger 3/8 fuel line and sending unit, overhauled the front and rear suspension, put in the correct springs for a new small block. I am looking at building a 350 or 383.

I'm looking at 9.5 - 10:1 compression, but would like to get away with as high a ratio I can with pump gas. Also looking at a dual pattern cam with 224/234 duration at .050 - runs about 470 lift.

Any suggestions out there? Carb, header size, etc? I want to keep the car street drivable for those weekend family cruises, but am a motorhead at heart. Budget will be about $4 - 5,000 for motor and trans.

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post #2 of 5 (permalink) Old Dec 21st, 00, 05:20 PM
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Location: Pensacola,Fl.U.S.A
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www.breckracingengines.com,American Speed,
3006 23rd Ave.SC,Moline,Il. 61265(309)764-3601, 2.00 for brochure www.paceparts.com $2,999.95 and up for turnkey motors.Or check out the Super Chevy
mag for more info.
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post #3 of 5 (permalink) Old Dec 22nd, 00, 02:51 AM
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You can get away with more compression with aluminum heads. I don't know if they are in your budget or what type motor you plan to build but you should be able to put a pretty decent street effort out for $5000.
Get a converter that will match your cam in terms of low RPM and be sure your heads will flow at low RPM as well for decent street performance.
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post #4 of 5 (permalink) Old Dec 22nd, 00, 08:14 AM Thread Starter
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Location: Kentwood, MI
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Thanks for the replies. I like the Pace parts site, but had trouble finding the other. I'm not opposed to a crate motor if I can find one that looks reasonably like a "68 vintage."

Toby - you bring up an interesting point about heads. How much flow is too much for the street? I was looking at the Sportsman II's - they flow about 200cc on the intake. The Trickflow heads were my second choice and flow a little less I think. As I see it, I should keep the RPM down around 6,000 max, it looks like a big step up in cost to go past that. I don't want to waste low end power buying a head that flows a lot in the high RPM's when I won't use it. I'd love to hit the 400HP mark with a combo that is drivable (by drivable I mean a motor that I can still drive easy when the wife's around).
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post #5 of 5 (permalink) Old Dec 22nd, 00, 04:36 PM
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I got between $35 and $3800 in my homemade 496 if you want to scrounge up a 454 block for a core and build it yourself. And I do believe that it will be easy enough for my wife to drive if she ever wants to because I mild cammed it for its size.

I have to admit that my engine isn't anything fancy, but 550hp at 5500rpm and 580t at 4500rpm isn't all that bad (per Dyno2000), plus, the bragging rights of being able to say I built it myself to me make it worth it. IMHO.

For the extra $1200 to $1500, you can add poly, subframe connectors, H-D front swaybar, H-D front springs and probably a decent street TH400 and maybe a good used 9" rear end.

What do you think guys???

Merry X-Mas. pdq67

Merry X-Mas. pdq67

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