nice work mate...dont do a 10 though...it takes all the fun out of it. Not if you want to keep racing it...Budget $6000+ to get the car tech'd (racesuits, cages, harnesses, $350+ a year for a race licence, belhousing shields, tailshaft loops, battery cutoffs, expensive helmet etc).
if i had my time again id build an 11.00 GTR with full interior and a stock looking engine that i could drive to and from the track.