I have two 538181 std. bore 2 bolt blocks and a set of 425a 4 bolt main caps and bolts for each. DK date codes but I will look if you are interested. Of course you would have to have the block you bought (if you did) drilled and tapped for the 4 bolt main caps and then have it align bored. $700 for either one with the 4 bolt caps and bolts.
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