"Hybrid" frame? part original/part tubing. OK or not?

The front part (from firewall forward) of my '36 Chevy frame seems solid. The remaining frame is not good at all. I'd like to keep the front section with the parallel leafs and solid axle 'cause I'm not planning to run fenders and I think it looks kinda cool. I'm considering using 2x3 or, most likely, 2x4 tubing to finish off the rest of the frame. Opinions? Past tech posts with pics on how to do this? Thanks

 

That is how alot of Model A Frames are built... mine is 2x3" tubing using the original front crossmember(under the radiator) and the front horns... the wall of the tubing is 3/16" thick...

 

Choose rectangle tube to match the size of the original rails.
From there,it is Cut and Weld.

 

A Chevy is bigger and heavier than a Ford, so you might want to go beefier than what they can get away with on a Ford. Probably 2x4 at least.

 

If 2x4, should it be 3/16 or would 1/8 be enough?

 

i used 2x4 on my 37 frame. It worked out decent, but I got rid of thoes *******ed parallel leafs....kind of wish i didnt now.

 

I use 1/8 wall and have great luck. very strong and it is boxed. 3/16
is ok but is 50% more weight and bullet proof.