71 383 HP with a stock 4 barrel intake, complete except no carb, 346 heads. Assumed 8.5:1 compression. Pulled valve covers and exhaust manifolds, looks clean, been sitting inside a friend's heated garage for years. Going in car with headers, dual exhaust, and a 4 speed, crank has correct hole/bearing. I have extra parts from another 383, including a Performer RPM intake and Holley 750, (also a tunnel ram and matching 600s). Small budget, looking to make it run again. What would be the best thing to spend a few dollars on? Is the RPM/Holley combo possible as is, or with a new cam? Or does the compression ratio need to be improved first? With possibly a used set of heads. My understanding is a set of closed chambered heads would raise the compression ratio. I have a set of 915s, however one of the 915s was machined below the springs and spacers used. I have the valves, springs, shims, etc, to put them back together but beyond my skill level, and not sure if it is even realistic.