Chevgirl,
Welcome. Nice to have 60-66 folks around stovebolt. Yes we will need the serial (vin) number on door of cab to make it easier to focus response. 60-62 suspensions are not conducive to your mod. Can be done but takes more drastic steps. If 63 things get easier.
Grill suggests mods were made to your 61 (which also important to your question) or you have a 63.
