| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | P-30 spindle swap requires 2 ton axle, hunt around 'till you find Griggs info.
No higher rear ratios than 3.55 for light trucks are available, get a Brownie or modern axle(single speed only) from the P-30 you get the spindles from, get power steering box there too.
I raised the seat 1.5" on my '54 which helped with legroom.
All your answers are here if one reads back through old posts, lock on refrigerator door.
Ed
'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.
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