318 Poly A engine in a 67 Cuda

Probably need to make your own headers, other than that should be a somewhat a bolt in.
The exhaust appears to be my only issue. I did some research and found that TTI uses the same part number for 62-66 B body small block headers as they do for 67 up A body small blocks. TTI makes poly headers for a 62-66 B body. And the 62-74 B body LB engine headers can be the same as 67 A body LB engine headers. So there is a chance.