1) No its not the same and will not just bolt in
2) Yes it can work, you just need a fox body input shaft (the SN95's v6 and GT had longer input shafts to move the shifter back, because the car is longer and slightly different proportions)
3) If you look in the tech articles I believe it is rated for 310 lb-ft. Its a nice t5, but may have lower gear ratios than a standard GT tranny.
No v6 ever came with a t45
Cardinal Red '88 GT 5 speed, 99 Contour Electric Dual Fans, Battery relocated, 130 amp alternator, 76mm Mass Air conversion, 75mm BBK throttle body, 5.0L .030 over, BBK SSI, AFR 185cc heads, Comp Cams XE276HR, BBK ceramic longtubes, Spec Stage II clutch, MM front/rear coil overs, MM front LCA's, MM manual brake conversion, Flaming River Manual Rack, 94-04 Cobra front brakes, 99 Cobra IRS, Torsen T2R differential, 3:55 gears