Olthoff has held events at VIR, or used to. Call Dennis. I've done 2 w/ #1855.
There have been events at Carolina Motor Sports Park too. Watched while many SPF owners tracked.
You should be able to find info on the motor but not sure how much Roush will tell you. The 402 was a popular option during the production timing for your car.
Check out
Second Strike - the Superformance Owners Group Mike compiles SPF info and has an excellent owners manual. Look for Blas' wiring diagrams here on CC.
Jim
SPF 1855 & 2584, FFR 8885