hello,
picked up a pair of "452" b/b heads for my stocker, has a 1/8" pipe plug on one end. is this factory? motor home?? never seen this before. also appear to be surfaced quite a bit, casting numbers on deck surface top 1/16th have been machined. deck thickness on lower head bolts is 1.00 thick, what's unsurfaced thickness?

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all parts are sold as is, all parts are considered used no warranties or returns
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