Glad to help, Bob.
I just realized it has been a while since I updated this project and actually a lot has gotten done. When I left off we had completely gutted all the former subframe out and only left the two side rails. I bought 24 feet of 1 x 2 x 1/8 tubing and Dan and I built a new subframe entirely. This one is tailored right for this frame and transmission and should free up a lot of cockpit room for the passengers.
Here is a picture of the rear portion of the subframe done:
Then we made the front portion of the subframe so it would hug the TH350 trans and define the shape of the hump we need to build over the transmission. This picture is when I had the pieces clamped in place to see how they fit:
Here is a picture when the body was turned upside down so Dan could weld it on the bottom too.
Now that the subframe is pretty much done I put the body back on the frame so I could start figuring out how to make the trans hump, driveshaft tunnel, and floors. The Olds engine has a 4 inch bellhousing that intrudes into the cockpit so I figured the best way to cover it was to simply make a squarish box to cover it up and to give me a spot to start bending tin for the trans hump. I first made a cardboard template and got a shape that would work, then I transferred that to 18 gauge steel and made the final one.
I made the box in four pieces so I could bend it up in our brake, and then I cleco'd it all together. Dan will finish welding all the seams up and make it one piece. Here is the box I made:
It also gave me a nice spot to mount my gas pedal. I decided to put the Lokar cable on top of the box so I can get at it for future replacement or adjustments. I will make a simple L bracket to hold it to the top of the box.
Once the box was done I slipped it into place on the firewall and as you can see, it will give me a good start on the hump. The next pieces of tin will go onto those rounded flanges and taper down in the back.
Those areas where the paint is ground off on both sides of the transmission is where I cut off two tabs that the TH350 has there. They stuck out over an inch on each side and serve no purpose, and cutting them off gave me a lot more room.
Don