Don, there may be a way to get the pushrod out of the port on V heads and still maintain the same layout. Had you ever considered a cam follower arraingment like that used in Ilmor Indy car engine raced in the 90's. Those followers can be narrower that a round lifter and lifter bores arent used anyways. probably could be retrofitted to any block. It's only time and $$$ !
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