The reason we are changing the brakes is because I had a conversation with Mickey at Total Performance before we put the brakes on and he said not to do it. They feel that passenger car disc brakes are too big and heavy on the front of a T and have found they create some shake at certain speeds. We went against his advice since ours were all chromed and stuff, and it looks like we should have followed his advice. His words were "you aren't going to like them."
Another thing we need to look at is shocks. Don is running friction shocks as opposed to hydraulic ones, and I am not sure they are able to dampen out any harmonics that are created. I am running hydraulic shocks, but I may need some shorter ones to get the shock into the middle of it's operating range. Right now, because of the car being so low, the shocks are pretty bottomed out.
I've been doing a lot of internet reading on this problem, and so many factors can contribute.........caster, toe in, loose components, tire wear and balance, etc. I just have to get back to ground zero and recheck everything.
I also miked the spindles and found the drivers side one was turned 5-6 thousandths too much on the outer wheel bearing area. I bought these off of Ebay, they had been already modified for later disc brakes and freshly chromed, so we assumed they were done right. I noticed some slop in the wheel bearings when I jacked the car up and shook the wheel, and the mike confirmed there was slop there. We have ordered new ones from Speedway and are scrapping the chromed ones.
Don