I had a factory gauge in my 65 GP and I believe it was standard in the GP with the automatic, it was graduated in both inches of vacuum and with 3 blended colors such that the left side ( green ) was labeled economy and the far right side which was Red ( and zero ) was labeled power. The middle range color was yellow and if I recall right if the needle was centered it was reading 10 to 12 inches.
The motor in the car was the standard 325 hp 389.
I think that feature was dropped because a lot of owners would hardly pay attention to a oil pressure gauge after a while, no less a Vacuum gauge, or that it was a hardly requested option and could only be used with a console to mount it to.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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