I've just sent a payment for a s1 rst gearbox, hopefully be here by weekend/early next week!
im going to get new diff seals from ford this week then get it fitted a.s.a.p.
like I said afew weeks ago here are my ratio's which I have atm, and ratios/speeds I will have with a s1 box -
S2 gearbox - 1st 40mph, 2nd 67mph, 3rd 99mph, 4th 134mph, 5th 167mph.
S1 gearbox - 1st 36mph, 2nd 60mph, 3rd 89mph, 4th 120mph, 5th 150mph.
..add 10% to them and that's what it reads on the clocks.
should be perfect/right inbetween how my old short ratio box was and the s2 box, also I believe the s1 lsd's are more aggressive than the s2 diff's which im looking forward to testing too!