Gear Ratio Recommendation For '68 Mustang With 347 Stroker And T5z Tranny

RestoModMark

New Member
Apr 14, 2014
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Here is the deal:

I have a '68 mustang coupe with a 347 stroker in it originally paired to a worn T5 Tranny. The Rear end is a 3.91.

I upgraded the Tranny to a T5Z World Class and found that 1st gear is a noticeably longer than before. I think I had 3.35 gears in the old T5. With the new T5, first gear is a 2.95.

While the new tranny is better, the car does not pull as hard as it once did.

So, I am wondering what the best recommendation gear package would be. I am thinking of going to a 4.11 to get the old pull back.

Thoughts? What have others done with a similar combo?
 
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