Stop in for a cup of coffee

Can you guys who have dealt with bigblocks see if you can help the guy out in the BigBlock forum?
He's got some sort of MSD distributor with timing jumping around pretty bad.
Maybe you can seperate whether its mechanical issue or not.
@halifaxhops
@RustyRatRod

I've upset the tab on a couple Chrysler dizzys for a tighter fit. But that was to reduce a couple degrees of slop not 12 crank.


493 carburetor tuning question