Here are some options.
I have a slightly used 14 spline clutch disc that you can have for free. Just pay postage.
NEW Clutch Disc Options
You should go with 11” if at all possible. The weight of your truck might cause the 9 + 11/16” disc to slip.
1988 Astro van with 4.3L engine clutch disc — 14 spline and 11”
Option 1: M-PACT clutch systems part # 384212 from Rock Auto
Option 2: SACHS BBD4212 from Rock Auto
1984 S10 2.8L V6 uses 9 + 11/16” 14 spline clutch disc
Last edited by Lugnutz; 03/16/2020 5:54 AM.