RPM PERFORMANCE
BRAND
This H.E.I. Advance
Curve Kit is designed to fit all GM H.E.I. distributors. This kit comes with 3
sets of advance springs to allow you to adjust the rate of spark advance from
fast (Brown), to super-fast (Silver), to ultra-fast (copper).
This kit will fit all 1974-1979 GM HEI distributors that are NON-COMPUTER CONTROLLED.
This kit will not work with computer controlled distributors.