I'm going to be putting discs brakes on the rear of my 92 D250. The brackets I have use a GM caliper off the front of a 4WD 3/4 ton pickup. My question is, there are two different calipers with a 2 15/16 size piston and a 3 5/32 size piston.

I'm wondering just how much difference between the two sizes would there be. I'm thinking that since these are going on the rear and 90% of the time or more I'm either running empty or hauling very light I would go with the smaller piston.

Curious what your thought s are.

"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.