[96riviera18]

for 250 you can get 3.4" s/c pulley, 180 deg t-stat, 2 range colder plugs, gut air box (that one is free), and some general mant that will have you running 0-60 in 6.6 and 1/4 in high 14's if you have good track prep,tires, and your car is in good running shape(ie not KR), of course for the same 250 you could get a OBD scanner which is nessisary prior to moding you engine.
i dont know of any one who has used the shift kit, most racers get a trans cooler b4 the shift kit on the riv.