| Brand | Proform Auto Parts |
|---|---|
| Manufacturer Part Number | 66948C |
| UPC | 037995319480 |
Check the listing for details. 1955-96 Chevrolet/GM; Proform HEI Mechanical Advance Curve Set. Condition: New. Listed at 7.99 USD. This Performance Advance Curve Set for 1975-96 GM HEI Distributors features precision machined chromoly weights and center plate to eliminate erratic timing. Three sets of springs guide bushings and complete installation instructions make recurving your distributor easy.Features:Fits GM HEI Models 1996 and EarlierWill Not Work On Computer Controlled HEI DistributorsIncludes 3 Set of Springs Limit Bushings and Weights for Custom-Curving Any HEI Distributor100% New Components; Not Re-man or RefurbishedSold as One Set.