Big Block vs Small Block Heater box - Team Camaro Tech
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post #1 of 7 (permalink) Old Apr 22nd, 13, 01:33 PM Thread Starter
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Pat
 
Join Date: Apr 2013
Location: East TN
Posts: 46
Big Block vs Small Block Heater box

Okay, since I'm currently wrestling with the heater core on my wife's 68 small block I've been reading threads like crazy related to it.

Why does the small block setup still exist? As far as I can tell there would be no downside if all of the heater boxes were the big block variety.

As it stands since I'm going to have all kinds of stuff apart I might try flipping my small block style heater core around and drilling some new holes in the engine bay side to accommodate them away from the engine. I can fill the old holes easily enough. Heck I can even find some big rubber grommets to seal the holes better than the closed cell foam. (yeah, there may be some tube extending involved).
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post #2 of 7 (permalink) Old Apr 22nd, 13, 01:42 PM
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Tom
 
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Smile Re: Big Block vs Small Block Heater box

There are a lot of "if they just made it for" it would have fit both. The only answer that I can think of is that they must have made a small block car first. They still do stuff like that, even today.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 TPI transmission, 12-bolt w/Eaton 4.11:1
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post #3 of 7 (permalink) Old Apr 22nd, 13, 01:48 PM Thread Starter
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Pat
 
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Re: Big Block vs Small Block Heater box

While I don't know for sure I pretty much assumed they only put small blocks in them at first. BUT. Once they made a new design for the big block why keep the small block version around? Yeah for repair and replacement but why put anything else in the new cars they built?

Quote:
Originally Posted by TJS69 View Post
There are a lot of "if they just made it for" it would have fit both. The only answer that I can think of is that they must have made a small block car first. They still do stuff like that, even today.
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post #4 of 7 (permalink) Old Apr 22nd, 13, 07:02 PM
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Bobby
 
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Re: Big Block vs Small Block Heater box

Don't flip the SB core, the tubes will curve towards the engine. Get a big block core and do the conversion, you will be glad you did.

67 Camaro 350
M20 4spd console,
8.5, 30 spline Eaton posi 373
Cowl Plenum
Custom 180 Headers
https://www.youtube.com/watch?v=1-8uYCabSog
black/black
no radio
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post #5 of 7 (permalink) Old Apr 22nd, 13, 07:06 PM Thread Starter
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Pat
 
Join Date: Apr 2013
Location: East TN
Posts: 46
Re: Big Block vs Small Block Heater box

Sadly all this came to me after I bought my new core but also after the lower tube (more curved) broke off due to a cold solder joint. I have some options. We'll see.

Quote:
Originally Posted by Luwi67 View Post
Don't flip the SB core, the tubes will curve towards the engine. Get a big block core and do the conversion, you will be glad you did.
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post #6 of 7 (permalink) Old Apr 22nd, 13, 08:17 PM
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Bobby
 
Join Date: Oct 2010
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Re: Big Block vs Small Block Heater box

Here are a few pics of when I did the swap, might be of some help.








67 Camaro 350
M20 4spd console,
8.5, 30 spline Eaton posi 373
Cowl Plenum
Custom 180 Headers
https://www.youtube.com/watch?v=1-8uYCabSog
black/black
no radio
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post #7 of 7 (permalink) Old Apr 23rd, 13, 05:48 AM Thread Starter
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Pat
 
Join Date: Apr 2013
Location: East TN
Posts: 46
Re: Big Block vs Small Block Heater box

Awesome. Thanks. I see that I don't want to drill holes to fit the flipped and redesigned heater core because I'd have to modify one the same next time. I guess I'll suck it up and just use the core I have the way they designed it.
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