I went the "U-pull-and save" route for my HEI (came out of a 301). Works better than the worn out points dist. One problem with late 70's HEI's is they only had 7-9 degrees of mech advance and 20+ degrees of vacuum advance. Can you say detonation? Re-curve and add an adjustable vacuum adv. Pontiac guru, Jim Hand speaks wellof the HEI. My orig dist was rusted around the weights and not reusable.