K10 short bed spring recomendations

[3x2GTO]

My 77 K10 short bed is overdue for new rear springs and I need some suggestions on which spring rate to buy. The truck isn't lifted and has old 33 x 12.50's on rally wheels now, I'm probably going to end up running 32 x 11.50 or possibly 33 x 10,50. I'll use the truck as a daily driver and possibly pull a car trailer once in awhile. (not sure how that's going to work out). I'm looking at 52" spring, 6(5/1) 2200lbs or 7(6/1) 2775 lbs. Both from General Spring.