Thank you all for the inputs, definitely gave me some ideas to check, especially the kill switch - any specifics on installing that would be welcomed.
The 493 is 10.8 compression w/ Eddy RPM 60929 heads, Comp Cams Xtreme Energy™ Hi-Lift XE285HL, timing is 34 deg w/ MSD distributor unclocked & MSD 6A. Like Oldmanmopar said, I added the MSD 8987 start & step timimg control for a 20 degree retard at start-up - but not exactly sure that its working correctly or not.
Cabling is 2-gauge from an older Taylor battery trunk kit.
