No way 37's will fit on a stock 1st gen. Ive tried everything from 33's to 40's. heck, I had 35's with a 6" and they would rub (it was used HARD though). My 37" boggers tagged the fenders with 7". I am now running 7" with 40's, and thanks to the sawzall, they fit, except they hit the draglink hard when turning right, until the crossover gets done.
My grandpa had a 93 with 285's and they hit the back of the front fender under full compression/slightly turned.