I just picked up a 1st Gen Coupe, SB with Factory A/C box on the firewall. Looking at headers online I can't determine if applications that say "No A/C" are referencing interference with the A/C box or issues with the compressor mounting bracket.

Any recommendations on headers?

I can fab compressor brackets and/or make minor mods to the A/C box for clearance. I'd prefer to keep the stock A/C box but a complete aftermarket system is not out of the question either.

 

I dont know the part number but I ran hooker long tubes on my 68 with factory air.