| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | It looks like you only need the OD, which is fine, since the two speed rear only gives you slow and slower ratios, no other rear ratios are probably available, so go for if that will get you down the road. Another option would be to replace the rear end with something modern, didn't say what your bolt pattern is, but 10 on 7.25 (GM) and big 6(also GM 2 ton) are suitable and easily found.
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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