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Originally Posted by 84HOtransam
ive got the 186 heads on a motor i just bought can you get more info on them
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If the 186 heads are the 2.02 intake and 1.6 exhaust valve heads they are from a Z28. Check the casting date. Generally speaking, the Feb 69 through Jun 69 dates are the most wanted. Even if the heads are 1.94 intake and 1.5 exhaust valves guys are willing to pay good money and will open them up to the bigger valves. They want the right dates.