Hello All, I need your help. Main objective for this car will be Track Days HPDE road course; an odd auto cross or 1/4 may sneak in but I will not build the car to do either of those. The car will not be my daily driver, only once in while and to/from track day events. I'll keep most creature comforts but am not opposed to making some deletion of interior items.
It's not difficult to backfit the later UCA and chassis bracket to the early S197, so that one is really a non-issue.
One item I can think of is the gear ratios in the TR3650 - there's a relatively big jump from 2nd to 3rd (2.00 to 1.32), and another big one from 4th to 5th (1.00 to 0.68). 5th gear tends to fall flat, and with 3.55's or numerically higher in the axle 2nd isn't good to enough mph to be very useful either, assuming you're respecting a 6000-ish rev limit. Another is the semi-remote shifter mounting (partly supported off the transmission and partly off the body). These items can be helped, or at somewhat greater expense corrected.
You'll want to step up to the 14" SVT/GT500 Brembo front brakes. The 12.4-inch stockers will work, but everything will run hotter (and on bleeding the initial brake fluid comes out pretty dark after only three or four track sessions).
You'll want the Ford Performance hubs with the ARP studs, and replace the studs in the rear with ARP studs while you're at it.
Ultimately, you'll probably want a Torsen, as the Trak-loc will gradually work its way toward being a Trak-used-to-loc. The later-year Boss/Laguna Seca got the Torsen for a reason.
I've tracked my bought-new '08 off and on over the last few years without stripping anything out of it or doing anything to it that'd be too 'hardcore-track' for the street. But for a couple of reasons now, I think it needs a close-ratio 6-speed and a Torsen with 3.73's.