I have a set of 1968 HiPo heads on my mustang. I am thinking about taking them off and putting on some Roush 200 heads. The HiPo heads have Crane stamped on them and some numbers. I called crane and they said they did some heads in the mid to late 60's from there catalogue and for Shelby. The intake on this engine is a early Cobra intake that is matched to the heads. The heads are a real work of art. They have 2.02 and 1.6 valves and are ported and polished extensively with round exhaust ports. Does anyone know anything about these heads. Crane cams said I was only the second person ever to inquire about these type of heads. Could anyone put a value on them?