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Help with Brakes Problems. I have a 78 Grand prix with Blazer Brakes upfront and 1985 Monte Carlo Calipers in the rear on a Quick Performance 9”. I can’t get more then 50% Pedal with the brakes. I have a stock Disc Disc Prop Valve from Summit racing. The master cylinder is stock. I believe...

Hello, I have a few questions about upgrading my Steering Box to a quick ratio one. I've bought the NAPA 88-277101 or PS 391080 Steering Box. Other then That I know I need a 800 Series Pitman arm. Looking at the Allstar ALL56354 Other then that I'm looking for a hose kit since i've read the...

Hello, Guys I have a question and wanted to see if anybody was running the C5 Calipers on the blazer spindles with 17'' wheels. I already got the blazer brake upgrade and wanted to do the C5 brakes but didn't know if it would fit and didn't know if 2'' of rotor was worth new wheels and tires...

Hey, Guys Looking for some help with picking the right size tires for my setup. I wanted to know if these wheel and tire size combo will fit with the 78 Grand prix. I was wanting to put 275x45x17 on the rear and wanted to know if anybody had done this with no mods Front 17x8 4.50 Backspace...

I've been wanting to start a build thread for awhile to keep tracking of everything and hopefully get some help and opinions from other members as I've taken stuff from the other builds I've seen on here and try to incorporate it into my build. The engine build as been a slow and painful process...

Hey, Guy I need some help with picking the right set up. I'm building a 1978 Pontiac Grand Prix and wanted to make sure I was on the right path for the rear end I got the Quick Performance 9'' set up for the rear. and needed some help for the control arms and bushings since I've read a lot...

Hello, Guy i'm looking to see if anyone knows where to find this black piece of weatherstripping on the quarter windows

Does anyone know if a delete plate was made for the 1978 Grand Prix? Any if so anyone have a photo of one.. Thank you guys

Hello, Was looking to see if anyone here could help me out and post the measurements of the Trunk for a 78 GP. Thank you