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1965 Dart 110k, 225, Carter BBD Super Six, 2 1/4 single exh., sbp manual scarebird front disc, 7 1/4 rear 2.94 sure grip, 14 x 4.5 OEM wheels, 833 OD with hyd. throwout bearing, HEI, electric fan, ram air/heated air, Accusump. http://plymouthcarclub.com/

I actually lost the bushing out of my timing gear (luckily 1 block from home) because the cam 'walked'. Doc has a quick post on how to make a cam stop to keep it in place. Use the search function and look for 'cam stop' by Doc*

I now do this to any slant I'm building.

-D.Idiot

A SL6 flat tappit cam has a taper on all the lobes which forces the cam rearward. The distributor / oil pump drive gear also pulls the cam rearward so in theory, the top (cam) timing gear will always be pulled up against the block surface.

I have see evidance that says otherwise... like a big rub mark on the inside of the timing chain cover.
To be sure the cam stays where it should, I weld in a stop made from a rockerarm adjustment ball screw.
DD