Howdy
The 6.2 should swap just fine. actually the new one will have a serp belt set up that will be better than your V-belts. Both engines should have a vac pump. The new one might have a belt driven pump but Im not sure. Everything on the new 6.2 is mechanical. I think the only thing the computer is for was the transmission. The engine should run by itself with little trouble. You will have to swap the transmission controller on the side of the IP on your old engine and set it up for the new pump.
The other option is just swap out the long block and retain all the old accessories.
Good luck!
1996 Chvy 3500 CCDWLB 6.5 Heathed, NO vac, marine injctrs, ARB bumper, BIG pipe, 3" lift, bright lights, bypass oil system.
1986 Chvy 6.2 M1009 blazer RAM AIR, Headers, Custom interior
2001 Chinook RV, V10 gas
1974 John Deere 1530 diesel tractor
1993 John Deere 455 Diesel lawn mower
1967 GTO, 1989 Honda Transalp
2009 VW Jetta TDI, flashed and piped, 6speed, fun car!
1998 6.5 suburban, stock, daughter's
1993 6.5 3500 CCSWLB GM8, Heathed, big exhaust, gauges, Son's
1984 6.2 ATS turbo 3500, SCDWLB - Son's
3 kids, 1 wife, 1 dog
Gunsmith, Tactics Instructor, Fabricator USMC 87-93 Semper Fi!