Thanks Dragsix

the Vacuum advance 1116076 is on back order at Chev's form the 40's, do you think that the extra 2.5 degrees will affect anything by going to the 1116043? Or should I stay with the 1116076 that Doug mentioned above? Looking at the curve numbers you posted it seems like there is a margin of error and it would work.

Thanks
Jeremy

1955 3600 father and son project