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Discussion Starter · #1 ·
Well, the cheap LS swap into The Deejay's 65 post car continues. Our latest hurdle involved trying to make the OEM heater box fit. Passenger side cylinder head/valve cover is within an inch of the firewall and partially blocked heater hose connections.

After some head scratching and kicking around several ideas that required relocation, cutting, welding, etc, we came up with a fairly simple fix. We tossed the original heater core and replaced it with one from a mid-eighties S10 pickup without A/C. This core is about 1 1/2" shorter than original, with all other dimensions the same.

The new core was installed into the heater box as far to the passenger side as possible. Original core hold-down clip worked just fine on the passenger side, and a new hold-down bracket was fabricated to take up the 1 1/2" gap at the shortened hose end.

The new core has the 3/4" and 5/8" connections reversed, but that's not a problem. The pipe angles weren't great and needed some adjustment, so we made sure to buy a copper/brass core which can be re-soldered pretty easily. Regular plumber's solder works like a charm. Just as with any copper sweated connection, surfaces must be clean and shiny with paste flux applied.

After making pipe adjustments and re-soldering we moved 2" toward passenger side and slightly upward which clears the LS head. Original firewall hose nipple holes were welded up and new holes drilled for the replacement core. The firewall side heater box had to be cut back a bit to clear the new pipe positions. We haven't finished the install yet, but I'll post some pix of the modified heater box and part number for the APDI core we used for the swap, and how it fits after installation. This same hack should work for 64-67 Chevelles, and maybe other years too.

If any of you guys have done some other mod to fix this problem, please reply. There's more than one way to skin a cat.:thumbsup:
 
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1964 Chevrolet Chevelle Malibu 4 door
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What engine mounts are you using?
 

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Discussion Starter · #3 ·
What engine mounts are you using?
Homespun engine stands and adapter plates using SBC motor mounts. We're cheapskates.
 

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Pics?
 

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1966 Chevelle SS396
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"... We haven't finished the install yet, but I'll post some pix of the modified heater box and part number for the APDI core we used for the swap, and how it fits after installation..."
 

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I would think it would be easier to use the slider mounts and move the engine as far forward as you can in order to get more room for the heater hoses to connect. Moving the engine forward also allows for better driveline angles because you can raise the rear part of the transmission up higher.
 

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1964 Chevrolet Chevelle Malibu 4 door
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He mentioned cheapskate, assuming his running a truck pan or something of that sort, have to run the engine back and high to clear tie rods and ps box. This won't apply to all swaps.
 

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He mentioned cheapskate, assuming his running a truck pan or something of that sort, have to run the engine back and high to clear tie rods and ps box. This won't apply to all swaps.
He most likely will have driveline angle issues with the engine mounted back and high.
 
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