Looking into a blazer

[softballnrd27]

So we are looking into a vehicle that can cart all 5 of us around on family camping, hunting, fishing trips. We also need to be able to tow an 18 ft pontoon boat or a pop-up camper. I have settled on the blazer platform but can't decide which year, are there any reasons to go with a certain model? Pre-76 with full convertible or 77 to later? It will get driven alot and on longer road trips as well. My plans are: Dana 60/14 bolt FF, 6.0/4l80e swap, 35 to 37 in tires, and I want it to be reliable and capable on and off road.