Local shop is pushing pretty hard to sell me a 300D (late 70s?) that has a bad motor. This is the non-turbo 617, auto. The car doesnt look too bad and he will take a few hundred for it.

Any recs on where to find a motor? Will a later turbo motor fit? How much mods to make it fit? Is it the same transmission for both motors?

The ebay turbo 617s are mostly over $1k, which is a little pricey considering there are still other issues that may pop up.

Thanks