Sounds like good advice. Firing order is good-no missing. I am really wondering if this motor from Mopar (contract builders) has problems out of the box. If it does, it may be hard to straighten out the problems. Hopefully someone has installed one of these and has experience in getting them to run right.

I have a 3550 lb race weight 68 Valiant with an out of the box 402 crate motor, 750 Holley HP, TTI headers, 4.10's, ATI 8" 4,100 stall, 727 manual valve body, MSD Digital6, with Cal Tracs springs/shocks/bars, and 275/50/15 MT drag radials (pulls the wheels!) that runs 7.50's in the 1/8th on motor and 6.90's on Zex perimeter plate with a 150 shot. The Challenger is 400 or so pounds heavier and is 1 second slower. I would expect the hemi should be capable of at least 7.80's-7.90's. Thx for your input.