polyhead 318 K Frame guestion

[troy.70R/T]

Someone told me that if you had a polyhead 318 K frame in a car that a big block should bolt right in. Is this correct? I have one that I was going to sell but if a bb will bolt up to it I will keep it. Thanks

[A383Wing]

what year K-frame? I know 66 frames are the same, not sure of the earlier years

[68CoronetRT]

My car is original 318. Has the same K frame with a 440 bolted up. and it's a 68'

[troy.70R/T]

Mine is out of a 66 Coronet. Would the steal part of the motor mounts be the same as a bb as well? Thanks guysy

[Cooter]

I bolted a latet "LA" style small block right where a poly came out.
No,small block and big block metal part of the motor mounts are different. You will need big block complete mounts regardless if it weren't a poly sb.

[troy.70R/T]

So then the steel motor mount on the poly 318 wil work on all big blocks

[A383Wing]

no...the K-frames will accept any V8 engine with the correct steel & rubber mounts attached for that engine (except Hemi)

small block & big block metal mounts that bolt to the block are different, will not interchange

[troy.70R/T]

Thanks for clearing that up 383Wing