How would you approach chasis set up with a full restomod???
 

I have been autoXing, and a bit of tracking/DE events with a few cars and i am about to get my dad's restomoded /hotrodded 74 911 out for fun. Not serious racing, but weekend use and a few DE events for fun and a more lively fun car to drive.
A brief recounting of the specs: (and if you think i have overstepped in any category, please comment).

Specs:
2.8 mag engine, DC 43 cams, 10.5 C/R, PMO 40 ITBs with MS2, EDIS twin plug, Ported to 37/35, SSIs, Scart Muff, cc'd balanced, big oil pump, Bypass mod, carrera fender cooler, light wheel and PP, LSD, full tranny rebuild, full suspension upgrade, HD rubber bushings, Adj ER spring plates 21, 26 t bars, 22 F/R Tarret antiroll bars, Jongbloed 7x15 wheels with 205x15 dunlop direzzionales, Bilsteines, green front and yellow rear.

Yes, i have a problem with cars, but would really like to hear
advice from those that have BTDT

you are limited by wheel and tire choices
7 w/ 205/50 all around is leaving a lot on the table
and may explain the t-bar choices which induce more than stock understeer

of course those big as* sways can tune that all out, still it's best to get the sways right and only fine tune w/ sways

unless you add SC/Carrera flares in back you would need an 8 ET30-32 to fit a 225/50

to fit a 245/40 x15 on a 9 would tak a lot of work w/o the flares