Hey, I am in the middle of this same job for my 70 Camaro. I too am using the stock pedals, hydraulic clutch bracket from Speedtech, GM hydraulic cylinder, Wilwood manual brake master cylinder and Wilwood proportional valve. After some hammer and dolly work on the firewall hole I got the GM hydraulic cylinder to fit ok, messaged the Speedtech bracket hole so the Wilwood cylinder would fit, I came across the next problem. The stock pedal bracket bolts that go through the firewall are not long enough for the clutch bracket, Wilwood master cylinder, Wilwood required spacer, Wilwood proportional valve bracket and finally the castle nut!! So I guess I will replace the GM firewall bolts with something about 1/2" longer. Hope you don't run into this one.
He is using a 1969 Camaro set up. It is different from a 1969 Firebird. A 1969 Firebird has a one year unique bracket, brake and clutch pedal set up. They look similar but are not the same. A 69 Firebird set up requires significant modifications so it is better to hunt down a Camaro set up than to modify a Firebird set up. 67-68 brackets will not work in a 69 Firebird or Camaro so make sure you get the right year bracket. The 67-68 brackets are shorter and will not match the under dash mounts. I cannot find a reason why Pontiac did this but I am sure they has a reason. The only thing I could think was that a Pontiac small block is a hair wider than a Chevy 350 so they had to offset the clutch pedal a little further to the left.
I picked up a '69 Bird with a hydraulic clutch to a Tremec T56 6 speed. The entire brake/clutch pedal assembly has side to side movement of about 1 inch. I am worried that it may be coming loose. Have you ever heard of an assembly having built-in play?
There shouldn't be much play in them. They should have a plastic bushing in them but see if you can find a schematic of the assembly and make sure all of the pieces are in the correct spots
@shaggyscarshop thank you. Yes, I'm going to crawl under it this weekend. It's a complete restomod, everything new but only 1k miles in 10 years and I've put 500 miles on it in 5 months so I think I need to start retourquing everything. Great video, thanks.