So i can use so far......

S2 engine, loom,
S2 suspension, wishbones, arms, hubs e.t.c.
S2 front/rear brakes (inc handbrake??)

S1 gearbox
S1 front anti roll bar (will this fit into the s2 hubs??)

(Its having a custom rad and cooler anyway)

Thanks for your quick replies......