657x exhaust manifolds

[Dereckt94]

hi i got a question about the 657 and the 657x, do their exhaust manifolds interchange or are they different? i have a 95 gtx and its got the 657x with the screws keep backing out by themselves?????, will a older manifold like a 93 from spx fit a gtx 657x. thanks any help is appreciated

 

[Bills86e]

The 657X and the 720 motors are a better interchange.

 

[Dereckt94]

So the manifolds are not the same?

 

[Bills86e]

mounting locations are slightly different.

 

[Dereckt94]

So use the 720 manifold. I found one on ebay and the part numbers all match so i guess it would be the one...