If I remember right that was a problem area on the alum frame on A-car. That may have been a fix to solve the problem. That is a stress point at the mounts. KW and Pete both used a cross piece in the same area. Yours looks like it was added but I don't really know.

I cried because I had no shoes till I met a man who had no class.

The Big Cam was stuffed in the frame rails last weekend, and I was too dumb to snap any pics. The test was worth while, and as usual, provided for a lot of head scratching. I messed up the front motor mount that I took out of the donor truck, so I tracked down a motor mount from a late FLD. This has 1" less drop than the original. There must be a rear motor mount that will work better that the ones I have because the current ones would sit on the top of the frame rails.

Another observation was that the flange had to be cut down for the big girl. So I took the leap on that.

I hope this turns out.
Next step is to make the drop in the frame for the radiator to sit.

It has been too long! For all of the effort Autocar went through to make a lighter truck using aluminum, they could have shaved a few pounds off the cab. My very nice neighbor who owns the forklift was surprised at how much this tub weighs.

Thanks for the update you've come a long ways and I know it wasn't easy or without $$.

Double Mountain Manufacturing LLC
EddyLucast@hotmail.com 
203-228-1961