Caprimaniac Rune What other modes are you doing to the car? If you are going full time or even half time racing you will need to look at coolers for the drivetrain or face lockup issues. I have been throught this problem with both G-Force and Richmond tannies. Bluprinting the trans is also a good idea.
A big issue will be your driving ability.
If you are a smooth shifter with out a superman forearm, you should get many years out of a trans. If you pull and bang gears, any trans will have a short life. The gears will last, the forks, shifter ball and the small parts inside will wear out and break.
I have 8 years on my G-Force, sent it back to them for a blue print checkout of all parts, they found nothing wrong and sent it back. I took me a year to learn to shift smoother, a little clutch pedal tap and in the next gear without any problems.
I am looking at a Richmond super street 5 spd for my next motor with a 2.80 first gear. I have a 3.31 rearend ratio but with the 482 motor and too much low end tork, it's a bear to drive in autocross. Any kind of man handling and the event is over. Roll on and off the throttle. The super trans is longer than the five speed. I have my car chassic built from ERA with a 1" farther back mounting location than the originial one with a top loader trans. I can install just about any trans if the tunnel is large enough. IMO I would take either the super richmond street or the G-Force T-56 with twin over drive and a 2.80-2.70 first gear. 3.75 ratio with this trans will be perfect. Alot of guys are going to the 4.10-4.11 rear ends with the new Mustangs to give them faster accelleration. I am not a big fan of the TKO's never had one, never will own one. TKO has fixed their problems with the new trans with better gears, shafts, and tighter clearances. I just believe that you get what you pay for. G-force is ALL in house manufacturing. Richmond is about 90%. Make sure you look into those coolers and pumps for the rearend and trans. Put them on switches, for cruising you don't need them. Racing the trans will not live long without. I have tryed just about every
oil in the rearend and trans, after a 20 minute race my shifting gets harder without the coolers.
Rick L.