Newer 318 engine.

[19plymouth72]

Hi guys i was wondering how easy it would be to fit 1 318 v8 5 speed or automatic(late '90s motor)into my 1972 plymouth valiant with a slant 6 currently.

 

[318willrun]

Hi guys i was wondering how easy it would be to fit 1 318 v8 5 speed or automatic(late '90s motor)into my 1972 plymouth valiant with a slant 6 currently.

welcome. 318 magnums fit in A-bodies. there are magnum swap articles if you use the search bar. I'll say this, to put a small block in place of your 6, you'll need adapting motor mounts, small block radiator and a small block tranny. As far as the 5 speed or OD tranny, there are articles on that also.

 

[67Dart273]

You slant transmission won't fit, and your choice as mentioned above is either to fab mounts, or buy aftermarket adapter mounts to fit the /6 K frame OR scare up a V8 K frame. "You could use" 68--76, but preferred would be 73/ later as those have the improved "spool" engine mounts

 

[RPMagoo]

Welcome -- From Pa.

 

[AJ/FormS]

There is a guy making or developing an adapter kit to bolt a 5-speed onto that 318. I haven't heard from him here on FABO for a while, and I forget his name. I think it was for an Aisen trans. Possibly,probably not strong enough for a warmed up 360, but perfect for a teener.
Otherwise than that; as far as swaps go, yours would be pretty easy.