[Kevin in NJ]

Yes boxing the frame can make putting together a factory car with the same fasteners very difficult.

Keep in mind that the factory A was designed to run 60 MPH over very poor roads one would drive at the time.

And, YES the cars were run that way for many many miles.

If you want a reliable safe easy driving car that run 60+ MPH anywhere then rebuild the car back to factory specs on the chassis.

If you want a car that makes a lot of noise, is not reliable or easy to drive then rod it.