Help me educate me please

If you are not gonna run the car at the track, the 8 3/4 will probably be ok. I have run spools on the street, not crazy about it. Especially if the car is more street than strip. This car should be REAL light, maybe 2750-2800lbs with no heater, race buckets. Mine had a 440, no heater, race seats, glass hood & bumper, manual steering/brakes, loop with a side bar,steel wheels on the back, was just under 3100lbs. Dont know what the rules are in your area, but here, if you need a new vin, you have to do a safety inspection, they might require a heater/defogger, I dont know.