I don't buy that. You can buy the cheapest POS headers for any Camaro from 67-82 and they will almost fall in and not hit a damn thing. Granted, there are no torsion bars, but if companies spent as much time on Mopar header R&D as they do everything else, we'd have headers that fit right, every time.
Look at the space by which these headers the OP is talking about won't fit. Less than 3/8". Are you kiddin me? There's plenty of room galore to make that problem spot fit with in any of these cars as long as it's not been wrecked and not straightened properly.
Shim the engine mounts? My big old butt. I've built and help build hundreds of Chevys with people and for people through the years and never had one single problem where headers were concerned. Not one. Never ever had to shim anything, even with worn out sagging motor mounts. Even with big blocks in Novas with 2" plus primary pipes.
It's ridiculous that a header priced in the stratosphere does not fit them all from A to Z with no trouble. People custom build their own headers for Mopars all the time that fit great. Header companies can, but won't. All because they cannot sell a bajillion of them like they can with Chevy and Ford. PERIOD.
Mopar has always gotten the short end of the stick. They always will. As long as yall keep buying overpriced, under made crap, that's what will keep being made.
