Hawk

I am looking to upgrade my stock 88 GT and am not looking to convert to 5 lug or 4 wheel disc right now. I am looking at getting the 73mm single piston caliper (Part numbers: Left caliper : R55247S , Right caliper: R55246S) that came on the 84-86 SVO. I read somewhere though that this was not a recommended upgrade for vehicles with the rear drums. Can someone shed some light on this either way. I am just looking for some better stopping power without converting to 5 lug.

r.barn

It's ok as long as you upgrade the master cylinder too.
I think those same calipers came off Lincolns too.

www.SN95brakes.com has some great info and parts for Mustang brake upgrades.

Hawk

So I would need to upgrade the Master Cylinder? Yeah, actually sn95brakes is where I saw the recommendation. When you go to maximum motorsports website and look at the pistons though, they say not recommended with rear drums.

Hawk

bump

r.barn

bigger master cylinder and you'll be fine.

Hawk

Thanks man. I take it the SVO unit would work as well for my swap? I also want to verify that this will not require me to change the booster.

raven_ghostwolf

I had the upgrade on my 87 when I bought it with 4 lug and rear drum. They work fine and is a nice upgrade. You DO NOT HAVE TO CHANGE THE MASTER CYLINDER. That would only be necessary if you convert to rear disc also, and even that I question from personal experience.

dillon1340

i have the lincoln 73mm on front too and am using the old master cylinder without any problems.

Hawk

Thanks for the input fellas. Looks like I will make sure to include this upgrade during my brake job this spring.

zeekstr

www.sn95brakes.com is pretty good for anyone who wants to upgrade the Fox brakes but doesn't have a lot of $$$ or is doing a little at a time.