Stay away from the Jim Weimer mustang 2 for your 46 chevy truck. I installed one earlier this year for a guy. He supplied his own parts. The crossmember welds to the bottom of the frame and the top hats weld to the outside of the frame and on top of the crossmember where it sticks out past the outside of the frame. It sat way to high. JW also sold him a saddle type motor mount crossmember that woudn't work because interference with hooking up the steering to the rack. The saddle type trans crossmember interfered with the power brake assembly. I prefer Heidts. I've also used TCI but they leave an extra 1/4 of material on the inside of their 35 to 40 ford crossmembers that needs trimmed off to fit between the frame rails.