I would go with a ACT clutch...MSD SCI ignition, new plugs and wires, and an oil cooler is never a bad idea...gauges wise I would go with oil press and EGT...If you get a EGT you really do not need an air/fuel (most suck anyway)
. Also probably wise to invest in a decent fuel controller like the Apexi or the new HKS AFR and a high flow fuel rail...that should set you up pretty good for the turbo.