305/350 Heads

My new 1984 Z28's 305 High Output is about shot. I have a 350, 4-Bolt main to put in it. My queston for all you experts is......Can I put the heads off of the 305 on a 350? If so, would the 305's heads with larger valves work better than the stock 350 heads? The 350 was in a street stock racecar that got T-Boned the first race and bent the frame ruining the car. The heads are to high of compression to run pump fuel. Any help would be awesome.