Rambo

Hey guys, Just purchased a KE30 Corolla with a 4K speedway-spec motor in it (minus twin webers/320odd degree cam) it has the following: Built 4k engine incl: Balanced Crank & Rods High-Comp Pistons Ported + polished + shaved head (around 11:1cr) Race bearings ARP headstuds Stage 3 cam (290 degree if i recall) Valve springs and retainers 32/36 Weber carb incl race intake manifold Re-cored radiator with thermo fan. Custom extractors with 2" exhaust 5 speed manual from KE70 Lowered. Cd/mp3 with 6x9s only Tacho with shift light Anyway, the brakes + suspension are pretty crap on it and I was wondering what upgrades I could do to it for better braking power and some more stable handling? Also, last night the engine started spluttering and won't rev - I found only the idler jet in the carby is squirting fuel and the other is blocked up but theres not much fuel pressure so it might be the pump. Once I fix it I'll post up some pictures!