TwistedMinis
+1y
Try the 79-83 2WD brake booster. Its 8" diameter, and same firewall bolt pattern. Depending on your truck, the master cylinder may bolt up, but I have heard of people having a different bolt pattern. Personally I have not experienced this. I have a newer master on my stock booster on my 80 Toyota. You will just have to adapt the push rod on the back of the booster to fit your pedal, I believe that is it.