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You didn't mention what model tractor, but there are many places online that sell manuals for tractors of this age. Search for "tractor repair manual ford 1964" and you will find them.
In a book store
Volume 4 section 14 of the shop manual
4800-5200 RPM according to the manual
Go to library and get a chiltons manual for your car.
The maximum speed of the 1964 Chevrolet pick-up truck is 90 mph.
you need a chiltons repair manual from the library for 64 chevelles
You can purchase a Haynes Manual that is for your car from a parts house or a bookstore.
With manual 3 speed trans, 94 mph.With manual 4 speed trans, 92 mph. With automatic trans, 91 mph.
It would be 102 MPH if that is what it says. Follow the manual.
A 1964 VW Bus can hold 8.75 gallons - answer came from service manual.
The best way is to siphon it out. The 1961 shop manual has detailed instructions on how to do this. Followed these and it worked fine.