Possible turbo 318 build

318's had steel cranks if they were a truck engine in the 70's with a 4-speed or if they came drilled for a 4-speeed. At one point they startee shot-peening the cast cranks for the trucks, but not sure what year.

I have one an engine my garage, and another in the engine in my Ramcharger. And Dad's got one in an engine in his Barn.

I know the one in my garage came out of a 77 3/4 ton P/U.

At any rate. They are out there for more than just the 273.

Now for Turbo, You'll probably want the dish pistons and lower C/R. Why not build one non-turbo. The turbo's wont fit under the hood of your 65 very well. Supercharger might fit better. Put a stroker kit in it, and engineer it to push the 400-500 hp you are looking for. My .02



I've never compared the steel crank in my 273 to a 318 steel crank OR cast crank.