I am using the brake pedal, but modified. It cleared my LS7/LS9 exhaust manifolds. Moving over a bit and shortening the stroke. We'll see. If I had headers I could see a real problem developing.
Do you have pics?

No pics but it is close to where the exhaust is on my LS mock-up block. Putting the cab back on the frame tomorrow to finalize the firewall mods. I have some Z28 LS7 manifolds. Thanks for the idea, I will test fit them tomorrow.

Don

Here is where the brake pedal came from Progressive. Clears the exhaust manifold, but moves it over where the column is. Hmm. I am using a Wizard Fabrication Steer Clear and have my column way up high on the inside of the cab because of my 59 Impala dash, so this does not cause a problem for me. I am still changing the pedal so it is closer to the factory location. I mounted my truck low on the frame. I moved my mounts on the frame lower. It's still rubber mounted and clears everything by about 1/2"

Don: Where does your brake pedal want to hit the firewall?

Todd

Thanks for the pics. I think your pedal is 2-3 inches further over than mine.

Don

Here we go. Bob(Progressive) sent me some matching 2"x6" frame rail so I could extend the chassis. Today we built the inner sleeves to make sure that the extension will probably be the strongest part of the frame. Tomorrow we should have this completed, then torque tube comes out to get lengthened at Gamel Street Rods.

Frame extended, Torque tube off to Gamel Street Rods. So I though we would tackle the firewall. We went a little tighter on the driver side for gas pedal room...

Some more updates today. Still have metal work to do on firewall, but we are getting it things closer. Waiting for the torque tube to make it's way back from Gamel to make sure the engine is in the exact spot before finishing firewall.

Any updates?

Don

Sorry for the hiatis...
Finally back on things. Chassis was off a little bit so we had to take the cab mounts off the pass side and zero in the cab and front end assembled before welding back on the mounts.
Well, cab mounts and the core support mounts are tacked on too. Everything is lining up nice now and centered...
Here are current pics.

Looking good. I'd love to do an old truck with a vette swap one of these days.