Below is the setup I used a few years ago and it was most effective for circuits, hillclimbs and sprints, you might find the info helpful. The low FD was selected because my most frequently used circuit had a relatively short main straight.
Quaife dog gear set, LSD, race straightcut drop gears - 1.0416, centre oil pickup, race output shafts & bearings, semi helical final drive. Ratios: 2.309, 1.49, 1.197, 1.00, final drive 4.07. Primary gear 24 tooth, effective final drive 4.239. KAD Quickshift.
Engine: Full race 1425cc
Carburation: Weber 45DCOE tipo 152 on Maniflow 7in steel inlet, MED integrated filter/induction box with revised carb trumpets.
Ignition: Aldon Automotive race distributor & ignitor pack, Luminition blue silicone 8mm race leads, Aldon epoxy solid state coil.
Exhaust: Maniflow big bore race LCB with matching Maniflow exhaust system, single box silencer, centre exit.
Power plot at ambient 14c, barometric 1000mb.
Max torque 107.10 ft lbs @ 5312 rpm
Max power 119.7 RPM @ 6991 rpm
Power loss, trans/tyres 19.4 bhp
Power at wheels 100.3 bhp
Max road speed in test 98.00 mph
Max engine speed in test 7655 rpm
Just remember: torque wins races, BHP sells cars - Enzo Ferrari