We had an old 48 jeepster with SBC and old jeep truck 4 X 4 parts. My son needed to rebuild the brakes and the parts he needed cost $ 500. We saw a 51 willys pickup at a car show on a blazer chassis. The guy said it was easy so junior bought a rusty blazer less engine for $ 150. The blazer had disc brakes and heavier drive train parts. It wasn't as easy as we were told. We lined up the rear wheels in the wheel wells and dropped the body down. We had to trim off the rear of the frame. the crosmembers and frame humps hit the floor. The engine had to come back 8 in to fit in the bay. that meant new motor and trans mounts, new drive shafts, E brake. clutch and brake pedal mount steering changes neither the willys or blazer gas tank fit. A friend dropped his 49 merc on a monte carlo chassis and his was easy.