| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If perhaps going diesel someday, it might be well to get as high a diff. ratio now, otherwise, another $1,000. to switch in the future.
8 lug 19.5 wheels are available, new ones are expensive, they were available in the past, make sure used ones clear brakes.
Might want to plan on Saginaw power steering with D-60 front axle.
D-60 front axles only come in 8 lug, so, will not have same bolt pattern(10 on 7.25") unless you are lucky and find an 8 lug one, if they exist? D-70's and GM 14 bolt ff come with 8 on 6.5 bolt pattern. 14 bolt are common, reasonable price, some come with disc brakes. 3.73 is highest common ratio with D-60's.
NAPCO 4wd diffs. only come geared low, so might not be compatible with highway cruising speeds, especially if going diesel someday.
Good luck, keep watching here for ideas and input, almost all questions one might have will have been addressed here in the last year or so.
Ed
Last edited by EdPruss; 02/20/2016 6:16 PM.
'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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