Just remember every one,The MP distributors built in the last 5-10 years have a Mallory style advance mechanism (like 70 duster,s).The correct kit is MP#P5153446.Springs intended for the older OEM distributors may work but the calibration chart may be off-I,ve never tried it,but I,m just mentioning it. I sell a spring kit for the older dists.with four different rates for $25.