Either or will work. I had to do a lot of work to get the mechanicals happy on the big motor. That was with a stock intake though. 800-1200 seems to be the going rate for those intakes. I wouldn’t expect to find one much cheaper. The mechanicals are also going for 800+ for a decent set. You...
With some work on the main body you can substitute in a 4412 500cfm center. There’s a guy in here that makes nice linkage.
I bought mine from him