Cool project! I have had three of those body style trucks. Currently I have a 69 3/4 ton 4x4 with a 396. I was going to make it a mud truck but I think I will keep it pretty moderate and throw some 35s on it at some point. Right now its just a fish/hunt/drink beer truck. My very first truck was a 72Blazer 4x4. Actually the 396 that is in my current truck was in my blazer. I had it monsterd out with 39.5 swampers on it. Due to the short wheel base, I could run over a 1 ton round bale. I have seen a few lowerd out 2x4 72 blazers and they were pretty neat also. If you lower one out, you should tub it and make it a sweet as hotrod. Keep us updated with your progress, air bags would be sweet.