You need the 302 Motor mounts, frame mounts, exhaust manifolds, radiator, oil pan, and a tranny to fit it.
I did a 351W in mine, and I say its a little too much work. But I havent been able to mat the gas yet.
Make sure to only go with a small block(289.302. 351) Big blocks can be put in, but Whoa Nellie!!!!