Indy Aerohead
If you use them, I would have them looked over by a local machine shop first. I bought a set of rebuild 318 heads from Aerohead from that timeframe and they were all messed up. While priming the engine I couldn't get oil to one rocker bank. The oil feed hole in that head was plugged. A repair had been made to that particular rocker stand and the oil feed had been plugged and not drilled back out. Once that was fixed, the engine was started and ran horribly. I had a machine shop look the heads over and all the valves were tight and hanging up in the guides. They also said the valve job was horrible. I ended up having my original heads rebuilt. The Aerohead set is sitting under my workbench.