[Sick5]

Morning guys.
So i purchased a 61 gmc carryal. But the funny thing is that it has 63 trim. The heater plate is the 63-66 smaller size. So I'm trying find out if the frame is correct since it didn't have torsion bars as well. How do measure to find out what year frame is it. I'm getting ready to purchase a dropped front end and want to make sure I get the correct reason ear