Quote:
Originally Posted by Jay S
I think the 505 cams originally were called Polydyne 505 Magnums back in the late 50s or early 60s. I have a Isky Pontiac solid roller dating back to the mid 60s with a rev kit. I am not sure if the 60s cams had the Magnum name but the 70s for sure did. My older Isky SR doesn’t have Magnum engraved on it. I think the Mega cams came much later in the 80s. The 505 Magnums came in roller cam and hard faced flat tappets, and usually were all single pattern cam with variation in LSA’s. Here is a photo on a 292 Magnum 505 solid roller cam I have, it is 252*@.050” on a 112 LSA. The engraving work is pretty stunning compared to anything you see today.
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The engraving like that is a lost art. I have some items engraved by Joe Mondello and Harold Brookshire, (Ultradyne) that looks similar in quality. Looks computer etched long before computers! Like an Arnie Beswick signature. Still looks near perfect after all his hand injuries.