i am looking at purchasing a '67 911S that has been set up for vintage racing. it have a substantial amount of engine upgrades including 12:1 compression pistons and an aggressive race cam. suspension mod's and safety mod's have also been done.

my desired use of the car is time trials, vintage racing (when i've acquired all the appropriate licenses) AND street use of the vehicle. by street use, i mean weekend driving, mainly short trips.

my questions to the anyone interested in offering an opinion are:

1). is it realistic to expect that a 911S with aggressive race upgrades can be used for street purposes?

2). if so, what steps must one take to "detune" the motor for the street?