hi probird, i havent finished boxing yet but i used a tube type trans mount off ebay. i plan on boxing the frame from the very front to the very back. even the openings on the front and back of the rails. i might change my trans mount to a one off piece just because i dont like the look of it. i am also going to change the radiator crossmember. thinking about using some rectangular tubing to make these. probably going to build my own shock mount across the rear out of the same material. i still have some hurdles to jump before i start my boxing and fabbing of these crossmembers. anyway that is what i have planned and done so far. hope this helps MO

MO's 1951 chevy 3100 resto mod project