exhaust woes ......1973 340 into a 1965 barracuda

M understanding was that only the 68-69 340 left manifold will work on these early cars. Have a set of 273 manifolds for sale if you go that route. They will definitely clear. Abodyjoes endorsement of the Spitfife headers performance improvement has me rethinking using them on my next conversion.
Biggest pain in the butt on them was getting header bolt access. I've had them off multiple times to ding the pipes for clearance. They're thick pipes too, it's not a piece of cake. Lots easier than making them yourself, although they're not under $300 anymore