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Old November 30th, 2015, 06:20 PM
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TJ's GMC TJ's GMC is offline
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Join Date: Mar 2015
Location: Cave Junction, Oregon
Truck: 1964 GMC 1500 LWB Wideside 305E V6.
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Default Re: Changing from 3 speed to a 5 or 6 speed

Considering an NV4500 for my 64 1500 as well. Subscribing to this thread for updates. Mine has the Sm420 4 speed and 4.10 rear gearing. Wonderful up to 55 mph so a 5th gear would be really nice. Only problem I have with the NV4500 is the use of a hydraulic clutch. Mechanical is much easier imop. I was also considering a gear vendors OD just cause they are fun. lol
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
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