In my 66 cuda I threw a 273 was a slant6 now the, problems is the steering column is in the way of the manifold simple not enough room any ideas or places that, sell custom made exaust manifolds
it should fit then I have a 318 in my 66 barracuda with power steering and original 1966 exhaust manifolds as it came from the factory, it's tight but it fits fine
I think we need some pics to figure out what is going wrong