Will the heads off a 383 stroker motor work on 1987 305 Chevy truck motor?

No, the heads from a 383 stroker engine will not work on a 1987 305 Chevrolet truck engine without modification. The 383 stroker engine is based on the Chevrolet small-block engine, which has a different cylinder bore diameter than the 305 engine. This means that the heads from the 383 engine will not fit properly on the 305 block without boring out the cylinders or using special adapter plates. Additionally, the intake manifold and other engine components may also need to be modified or replaced to accommodate the larger displacement of the 383 engine.