12.4 at 120.8mph ? how much power?

I am consistently running 12.40's at 120 on street tires, the quickest pass was 12.12. I have a wheel spin problem cause the mph is up there and that is back peddling first and second all the way out of the gas. I am curious to know if any of you have a similar mph in your 03-04 vert. I would really like to get a estimation on how much power this thing is making. I have some more parts to go on but this car is down right fun to drive.
 
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power

what type of street tire are you running?

i go just for fun street tires and full tank of gas...im still stock..my best is 12.9@114

if i had to guess on power about 450@wheels

anyone else have guesses
 
I trap at 121-124 with 2.2-2.3 60fts. My car makes 591/548. Do NOT have the PPRV delete. I should. Car would go 130 I bet. This thing cuts out BAD between gear shifts, it's annoying.