Many of the timing chain sets we see, ALL brands, often don't sit well on some of the cam snouts. We notice it more on the BB units. They actually have a slight interference fit (not by design, but by mfr. tolerances). Many of the cam gears themselves we trim in the lathe. This is very easy item to overlook. You think the bolts are tight, but when it runs in the unit, the gear starts to "wobble" and all hell breaks loose. It doesn't show up as easy when checking the end play because the "button" sits directly on the cam. Thanks, Gary in N.Y.TWC said:
P.S. I'm just slightly curious about your combo, assuming it's the one in your signature. A small (496" BB) unit, a 289* @ .050" cam, 4.10 gears, and 3600+ lbs., I'll admit I don't see the C.R. (although I can't see that mattering one way or the other), and your going to put a head on top that flows 400+ CFM (guestimated). I'd really like how this unit runs when you make the initial passes. This is just out of sheer curiousity.
