don't use BFGs period. that may help your issue a bit.
1993 K3500- 4x4, single cab/long bed, single rear wheels, 4.10 rear end, F vin, GM3 turbo, Nv4500 manual with Luk clutch and single mass conversion, 3" front lift/level, factory red interior.
A few mods: 3" straight pipe, Bosch boost gauge, Bosch glow plugs, Draw-tite class 5 hitch. Hi-flow water pump, 94+ radiator and coolant tank conversion, kept the original single thermostat setup (at least for now).
Gone but not forgotten: 2001 silverado 2500hd CC/SB, 4x4, 6.0 vortec, 229k miles when I traded it.