Originally Posted by fast68plymouth
Swapping the carb and ign box are easier tests than swapping the springs....... but if they make no difference at all, and it still runs into the wall at 4K......... It’s going to be tough to not start taking a harder look at the springs.

Obviously I’m not seeing or experiencing it first hand........ but from the description........ it acts just like it would if the springs wer giving up.



Yes, I agree.. it's just disappointing if the springs are in fact the culprit. I'll do some more testing and report back.

1966 Satellie.. 12.55 @107.75. 906 heads. 3780 lbs.