First let me say that I have read this entire thread, taken measurements of my rig, and added that data to the Delta spreadsheet. I'm very happy with how my truck drives now with 4.6 / 4.3 caster, but I am making some changes that will necessitate removing my MAF Drop Brackets, so I'll be ordering Delta VS arms now. Hoping to get back to something close to the 4.5-ish caster I have now because I really like how it drives.
My current setup:
Dobinsons 2.5" VT Springs C97VTB 146/147
Dobinsons 2.5 degree Rubber Caster Correction Bushings
Man-A-Fre 3" or 4" Drop Brackets (Came on the rig, not sure which ones I have. The mounting bolt holes are 3.5" apart)
Dobinsons 2.5 degree rubber caster bushings PB59-503K
Delta 1" Front Spring Spacers
Delta Rear Panhard Lift Bracket 3"
My rig is pretty heavy - but I am still getting lot more than lift than you'd expect out of this so-called 2.5" lift kit.
Height Difference in front panhard mounting bolts: 5.25"
Height Difference in rear panhard mounting bolts: 3.00" (after correction with 3" Delta RPHLB)
Slee Shortbus front bumper with ComeUp winch
Rocky Road Sliders (to be replaced by Hanna Quality sliders)
Custom Rear Tube-style rear bumper with Full-length swingout with Spare Tire Mount
Rotopax Mount with 2 3G cans added to rear bumper swingout (cans empty)
Goose Gear Full drawer and Sleeping Platform (recovery equipment, spares, emergency supplies, portable compressor, tools)
Tires (Toyo Open Country R/T Trail - 35 X 12.50 X 17)
10" Subwoofer in custom enclosure - Right Rear Quarter Panel Area
I am pretty sure I need to go with the 5" (5L) Delta arms:
5" Lift = 8.8 degree loss of caster
Delta 5L Arms add back 8.9 degrees of caster to the base of 3.0
I end up with 3.1 degrees of caster - which is right in line with the factory spec.
But my question is, will I miss having 4.5+ caster like I have now? I do plan on going up to 37's fairly soon. Not sure what else I can do. I don't think they make the 6" arms any more. I guess if I wanted more caster than the 5L's provide, I could swap over my Dobinsons 2.5 degree caster bushings, but I'd prefer to go with OEM bushings. Am I thinking correctly here? Should I just take the 3.1 the 5L's give me and be happy with that?
My current setup:
Dobinsons 2.5" VT Springs C97VTB 146/147
Dobinsons 2.5 degree Rubber Caster Correction Bushings
Man-A-Fre 3" or 4" Drop Brackets (Came on the rig, not sure which ones I have. The mounting bolt holes are 3.5" apart)
Dobinsons 2.5 degree rubber caster bushings PB59-503K
Delta 1" Front Spring Spacers
Delta Rear Panhard Lift Bracket 3"

My rig is pretty heavy - but I am still getting lot more than lift than you'd expect out of this so-called 2.5" lift kit.
Height Difference in front panhard mounting bolts: 5.25"
Height Difference in rear panhard mounting bolts: 3.00" (after correction with 3" Delta RPHLB)
Slee Shortbus front bumper with ComeUp winch
Rocky Road Sliders (to be replaced by Hanna Quality sliders)
Custom Rear Tube-style rear bumper with Full-length swingout with Spare Tire Mount
Rotopax Mount with 2 3G cans added to rear bumper swingout (cans empty)
Goose Gear Full drawer and Sleeping Platform (recovery equipment, spares, emergency supplies, portable compressor, tools)
Tires (Toyo Open Country R/T Trail - 35 X 12.50 X 17)
10" Subwoofer in custom enclosure - Right Rear Quarter Panel Area
I am pretty sure I need to go with the 5" (5L) Delta arms:
5" Lift = 8.8 degree loss of caster
Delta 5L Arms add back 8.9 degrees of caster to the base of 3.0
I end up with 3.1 degrees of caster - which is right in line with the factory spec.
But my question is, will I miss having 4.5+ caster like I have now? I do plan on going up to 37's fairly soon. Not sure what else I can do. I don't think they make the 6" arms any more. I guess if I wanted more caster than the 5L's provide, I could swap over my Dobinsons 2.5 degree caster bushings, but I'd prefer to go with OEM bushings. Am I thinking correctly here? Should I just take the 3.1 the 5L's give me and be happy with that?