Pontiac GTO 1967 400CID 4sp manual OVERDRIVE

Dedek963

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Because of very short rear end (about 4.11 according to the calculation)
I was considering to change the gearbox, which is Muncie M 20 with another gearbox from Tremec.
I would love the 6 speed Tremec with similar gear ratios in 1st 4 gears and have 2 more over.
But the necessity of body cutting made a clear stop to this project.
Now I am considering to buy an overdrive from GearVendors, where there is probably some minor change to the body.
Do you have some experience with the overdrive from GearVendors?
 

Dedek963

New member
29
0
1
Prague
Thank you for the video. It seems that the amount of changes is very similar to what somebody has to do in case of changing to Tremec gearbox.
So I finally decide to buy Tremec Magnum 6 speed with this gear ratios:
2.66, 1.78, 1.30, 1.00, 0.80, 0.63

Thank you for your help :)
 
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