I have a original 4 core harrison that was gone thru and has about 2k miles on it changed out for an aluminum on a customers car I sold him.. I also may be getting back my 400 and 4 speed m-21 both with less than 4k miles on them another customer wants to put an ls1 in my old 67. I should know in a few week if I can buy it back! It has kaufmann d port heads, roller cam,kaufmann timing cover , high flow aluminum pump, aluminum intake fits under 400 hood! questions call me 520-490-9097 Bill S.
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