A Snake Hi Al I maybe wrong but I thought you could make any 427 a hydrolic lifter motor if you pulled the plug out of the
oil gallerys The different between the SO and center oiler was the
oil on the SO feed the bottom end first, being the crank and
oil was sent around the cam to the top end. The center oiler was reversed. Thecam area was first to get oil and went down through the main webbing to the crank. My wording may be a little off but this is the conscept. Wait for the pro's to answer. Rick Lake