| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If you tell us where you are, rather than just USA, one of us might be nearby, with a 420! What is the rear gear ratio, what one thinks it is might be is far from reality, check it for sure, then make an informed decision how to proceed.
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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