does anyone know if the disc brake kit for a 1972 gto with the b.o.p rear will work on a delta 88 if not then what will ?

 

No, it won't fit. The Delta 88 uses a 5 on 5 bolt pattern. The A-body (GTO, 442, Skylark, etc.) use a 5 on 4 3/4 bolt pattern. Sorry, I don't know who might sell an aftermarket setup.

 

summit has 1 for a 5x5 bolt patter for a firebird i think but its a 70

 

Double check that with them. The firebird would also have the smaller 5 on 4 3/4 bolt pattern.

 

https://www.summitracing.com/parts/w...3513/overview/

 

Well, I read through the ad and am not sure. Maybe someone else here has used these? It does describe these as fitting the 1964-70 8.2 rear end. Your car has a different, larger rear end.

 

i may swap to a chevy 12 bolt out of a 95 caprice cop car with factory disks

 

No such thing. The Caprice police cars used an 8.5" axle. It also won't bolt into a 72 full size. The brakes CAN be adapted to the 72 housing, however.

 

I'm curious. Why is it so important to have rear disk brakes on this car?

I had a '75 Delta 88 and a '73 Custom Cruiser, and I have a '78 Toronado now. All three are big, heavy beasts, just like your car. All three have front disks and rear drums, and they stopped on a dime. If your car is not stopping as it should when the brakes are pressed, perhaps new hardware or proper adjustment would help.

I don't think that changing to disks will gain you any braking advantage as most of the stopping is done by the front brakes, which are already disk. Changing out the rear end and all that would be a lot of work and cost some money for a very small, if any, gain.

 

I had the same thoughts. The braking system needs to be balanced for the weight distribution of the vehicle. Simply adding rear disks won't necessarily improve braking. If the rear disks lock up prematurely, you'll have directional stability issues (especially if the road is wet). You need to understand the purpose of an adjustable proportioning valve and how to adjust it for safe braking under ALL driving conditions (road surface friction, load variations in the car, etc). Also be aware that tires have as much effect on stopping ability as do the brakes.

 

I have never investigated putting rear disk brakes on my 71 98. If I did anything to the rear suspension of my 71 98 it would be to install a rear sway bar or posi-traction rear end. I know one of our members has a 71-76 B/C body with a rear sway bar. Is it your 75 Delta 88 Jaunty? Also, MonzaZ posts from time to time with a posi-traction rear end for our cars. It seems to be just as rare as the front disk parts for 65-70 B/C bodies.

 

im resto modding the car hence going to disc brakes im swapping to a 455 gm 4l85e holley sniper efi

 

I think it would be a cool project. Definitely a big undertaking though since you would have to change and optimize the proportioning valve like Joe mentioned. If there's a way to do it I don't know how it can be done... at least not easily like getting a Scarebird kit to replace front discs on your 65-70 B/C body. I guess anything is possible with enough money.

As far as overdrive transmissions are concerned a lot of folks swap to a 2004R because of the BOP bell hosing. Apparently, the gearing is pretty good for Olds engines too.

 

Yes, I would say it was a jaunty vehicle.

I sold it in 2001. Here's a photo of the front end I took at a car show in 1999. Note the license plate. It's where my username comes from.

 

im running spray on the 455 and im getting the efi computer that will control a 4l85 e

 

You need the Terminator to control the trans, do you not? The 4L85E is a robust trans and that is a heavy car. Add a girdle and good internals if you are spraying a 455.

 

i may go with a seperate trans control im not sure yet