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If you pull the dist and add a piece of hose thats snug on the shaft just a little longer than the space between the bushing and where the shaft comes through the dist housing that should take most of the timing jump out of it.. once you do that and if it corrects it then use a clamp on sleeve for it(they're cheap).. might try a bit larger squirter front and rear.. if it gets better try larger... when you went higher on the base timing did you restrict the max timing.. that takes welding up the slots.. otherwise you will end up with way too much timing... also.. keep the vac unplugged at the dist but plug the hose until you get a handle on this
Put the hose on the distr. shaft Vacuum advance is plugged bought a pre set disk from FBO and put that in the dist. set at 18* tried a different timing light and the jumping mark has stopped Now to get the idle and cruise a bit leaner
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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