Rear Shock Mounting Question?

[comegetsome2003]

im putting together my 82 GMC now for a play truck.....havent really spent much money on and am just mostly using spare parts that are laying around.....so far i have swapped the 355 out for a stout 468 that was in my Nova race car.....motor has been 6.30s(1/8th) mile in my car....built t350 trans....just swapped in a 12 bolt with 4.10s and tru-trac....needs some ideas or recommendations on how to mount the rear shocks....i have some Monroes i took off it that were mounted in stock location....truck is lowered 5 inches with a flip kit...gonna be street driven alittle and on 325/50 Nitto 555s....ill swap to some drag shocks....ive read that as straight up and down as i can get them will work best but id like a few opinions from somebody who has more experience than me at this....thanks in advance