I did it as an upgrade on my 1987 4 cly's brake system.

I changed to larger diameter mater cyl one from a V6 model. Also my original one was cast iron and the replacement was aluminum. Looks better , wont rust and saves a little weight.

The larger cylinder also gives better pedal feel / faster take up. When combined with the V6 brake booster you get a lot better stopping. I don't recommend just swapping the master cylinder, swap the booster to.

That's why I swapped mine. On a 1990 Turbo Diesel, not a clue what an upgrade would be.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...