...I'd like to get it to 65 and that be it. either by disabling the governor, or removing/breaking it to where it won't govern...
While you might get the old Stovebolt engine to run fast enough to achieve 65 mph it may not last longer than a few minutes or days at best.
The real issue is the gear ratio in the rear axle, it's slow because it's a large truck with low power, needs slow gears to get the job done. Check your gear ratio, but it's likely 6.17:1
Using a gear calculator you can enter the variables and find the speed.
http://www.onlineconversion.com/bigger_tires.htm65mph, 6.17 axle, 1 for transmission (and 1 for transfer case because you don't have one) tire size of 36" should be close.
The answer is ~3,750 RPM... might run that fast but won't like it at all.
Either be content with a speed closer to what the truck was built for and can actually do.
Or make a lot of changes, starting with better brakes and a suspension and steering rebuild then ending with enough power and fast enough gears to do what you think you want to do.
