Join Date: Aug 2001
Location: Connecticut, USA
Re: Wrong Heater Core
I just went through this and couldn't find a small block core that would install w/o removing the firewall cover on the engine side so I converted it to a big block core and just got the cover plate for the firewall side box. All the small block cores I got had a lower tube that was 1.5" longer than the one I took out making it impossible to get the tubes through the firewall w/o removing the engine side box which I wasn't going to do. Just an FYI to watch what you get for a core, maybe you'll have better luck but I gutted it under the dash to try and get as much angle on the inner box with the core and it just wasn't going. The only thing that might have worked woudl be to put the core in loose and then slip the box over, but then it wouldn't have a retainer clip.
For what it's worth I tried cores from ground-up, year one, summit racing, and several auto parts stores.
62 Corvette (Stock Restoration)
68 RS/SS Camaro, LS7/T56
68 RS Convertible project LS3/480/4L70
2006 Corvette Z06
2011 Corvette GS Convertible