Have a set of Pro-Gram billet steel 4-bolt main caps for 360 mains for sale. These are made to work on a stock 360 block (offset outer holes are made to go into thicker area of the factory main webbing). I bought these with intentions of building a W9 360 but I've changed routes. From what I see online, these are out of stock everywhere. I would like to get $500 + shipping for them.
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