[scott70]

Originally Posted by jhein

I have the TKX with 2.87 1st/.81 OD. 467 cid, 3.31 rear, 27 inch tire.

I totally respect FJs comments and I'm sure you would not go wrong with his advice. But, I think it depends on how you drive the car. If you do a fair amount of driving, cruising at 75 or more, then the .68 OD is probably a good idea. If you rarely cruise that fast for prolonged periods then the .81 would be as good or dare I say a little better. The roads I drive on are 55 mph roads. At 65 mph I'm at like 2100 RPM and I can do that all day long. 75 mph is around 2500 and is still very comfortable. I think if I had the .68 OD I would use it less, but maybe I'm wrong. But, I'm very happy with my overall gearing.

You could also do the 3.27 1st/.72 OD. But even with the 2.87 1st, traction is an issue so I'm not sure how the 3.27 would do.

Most of my highway driving has a speed limit of 60 which means I drive at around 65 mostly. Only occasionally do I go on I95 which is a limit of 70. Before my post I went on the wallace site and plugged in a bunch of different senarios but I wanted to hear what real world experiences were from you guys. Didnt want the car running like a high idle at 60-65 mph,,,I dont mind some rpm ,,,2800 cruising is just a bit much for me. Also the 2.87 VS 2.20 with my 3.31 gears sounded like a nice change for taking off whether its a hard or easy take off. With the iron exhaust manifolds it dynoed 480ish hp and 560 trq. Headers it was a little over 490 hp and 570 trq. I do play at the 1/8th mile now and then on bfg t/a street tires and the 2,20 1st gear sucks.

Yes I would definitely have a custom driveshaft done and not cut up my original. Also my original shifter was mentioned. On mine the chrome handle isnt a simple bolt on. and the rear gear ratio and back tire size are not going to change.