On my last pump gas street and strip motor 517 C.I. stroker (727+ HP on pump swill at the flywheel) I recurved the stock distributor by welding up both advance slots so it had 16 crankshaft degrees (the distributor had 8 distributor degrees in it) total mechanical advance and set the initial timing at 14 degrees before top dead center and ended up adjusting the distributor to have 34 degrees total at or before 2000 RPM by using the Mr. Gasket 925 B advance spring kit for Chevys shruggy
That worked very WELL on the street and at the track.: up:: scope:

Last edited by Cab_Burge; 06/27/22 04:27 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)