My car might be a fake? Please help.

Not sure what the touque boxes are? I also had a bunch of work done to the front end bushing, ball joints, shocks etc.... the guy at the shop told me that it was a slant 6 car originally because it had the smaller ball joints and so on. Thats what got me looking and wondering if it was a true 340 car.


Torque boxes are on the frame where it attaches to the floor boards. there are 4 per car, two for the front frame (left and right) and two for the rear frame to floorboards (left and right also).


What size brakes are on it. Slant 6 cars had 9" drums standard, V-8 had 10" drums standard. However brakes can also be changed, but if there are 9" drums, I would think it was originally a slant 6 car....