The pump and the MSD race ignitions can suffer from low voltage shruggy
Maybe it is time for two 16 V batteries or a big amp alternator work
I saw a slight ET(.003 to .004) and MPH loss(.17 to.2 MPH) on my old M.W. stocker by turning off the alternator feed before the runs with a charged up battery on back to back runs three times shruggy
When your chasing every bit, a thousands can make a difference grin

Last edited by Cab_Burge; 12/11/17 10:36 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)