You've gotta love the old Triumphs. It's fair to say that I have collected a few!
Here is a special one, 13/60 Estate, 2.5PI motor, converted to EFI (XJ12 Injectors), Motec, Eaton M90 Supercharger, 3.9LSD - Nissan IRS, big brakes, was 300hp and road licenced!
I got a bit bored and pulled the Triumph motor in favour of the RB26 GTR Skyline engine. Ditched the twin turbos and went for the same Supercharger again! 400hp now. Last race meeting she tipped in at 801kgs wet.
I've had several Mk3 Spitfires to, just begging for a 2.5 and 4 speed + OD.
Go get your GT6!