how fast is a stock gsl rx-7 from 1983? in the quarter of course, mines doing about 71/2 seconds zero to sixty- i want to know if its above average or not, i thinks its had some work done and i'm trying to find out what before i do more and the car i had before this one was much slower- an 82 rx-7 base model. thanks for any help

 

Around 17.0 in the 1/4.