I put P-3500 HD front hubs/spindles on my GMC ‘55.2 front axle. Had new king pin bushings made,($12. ea) ,no other changes. Used ‘60’s tie rod. Spindles need to allow tie rod to reside behind axle. Note: there are at least two types of grease fittings going into king pins, make sure yours are properly lined up(simple). Measure thread pitch carefully, drag link, tie rod, etc., I have found 16 tpi and18 tpi on same truck, hard to tell apart unless measure.
Installed right width D-80 disc brake rear axle, made shims to fit different diameters. Found another set of front spindles/D-80 nearby.
One can use 22.5” wheels with 5/10 bolt pattern(rare), 19.5” wheels with 5/10 bolt pattern (common) or make wheels from scratch or redrill 22.5” wheels with 10 on 8.750” pattern by redrill ink and spacer.
Stories and px in past posts.
Ed
Last edited by EdPruss; 12/03/20223:20 AM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
