the only problem with the 30's GM's is that the body structure is made of wood.
very time consuming replacing it with steel but very satisfying when you roll out with a pre 36 GM.
i have a 30 olds, well.. the cowl and doors off of a 30 olds, with the rear 1/4's of a 31 chevy 5 window coupe. and the back window out of a 36 chevy truck.
im ammazed when people tell me " ive had a car like this, its a plymouth, right?"