my dart left me stranded

No I never hear of readjusting preload on hydraulic lifters. I just was screwing up cause I did not think that after a while the pushrods would feel loose again. But that is what happen till the motor starts up. Its really not that hard, its just not second guessing yourself. Hope MSD gets you a new box or atleast makes your old one as good as new.

I did forget that the first year I had my MSD 6 box the motor would not start, ship the box to MSD and 3 weeks later got it back saying the box was A ok. I am not sure if its was but after that it was fine for 7 years