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Old 01-27-2014, 05:28 PM
  #8  
coloradoracerguy
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Join Date: Dec 2007
Location: Morrison, Colorado
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Originally Posted by roadkill2
Unless you're putting that BBC in a Dusenberg, notching the firewall with a pre made, rivet in assembly would be a hellova lot cheaper . . . and simpler.

About the only reason one would really need a front distributor would be because you're making spare parts at above 8000 RPM with a Magneto. A mag pulls so hard on the back end of a camshaft at high RPM that it progressively retards the valve timing and Ignition timing. A Mag will pull so hard it will actually twist the cam . .

We discovered that back in the mid-late 60's in a Jr. Fueler with a 310 inch SBC. But back then there was no fix. At least for the Chevy's. But the guys with the 354's and the 392's jumped on it and If I remember correctly, Dave Zeuschel built the first front drive timing cover for the 392 . . That by itself kept a lot of those 6-71's in one piece and on the engines . . .
We broke a cam like that in our pro mod in Alaska. Popped about half track. New Century block, 55 mm cam, Pro Mag 44 in an offset drive......racepack showed it let go at about 9100ish......broke right in front of the distributor drive gear. Next event we had an RCD gear drive and front mount for the mag.....problem solved, but it wasn't cheap......
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