iam looking to do a LS1 motor swap and T56 6 speed swap in my 1985 IROC Z-28 with the next 2-4 years and this is my parts lyst that will give me around (475HP/425RWHP ) 11.0:1 Compression 59cc Patriot Perf. LS6 Ported cylinder heads Fully CNC Ported, 2.02 Intake 1.57 or F.A.S.T. 90mm Intake Exhaust Stainless Steel Under Cut Valves Patriot Gold .650" Dual Springs Bronze Guides Titanium Retainers 5 Angle Valve Job Rev Valves Super 7 Locks Hardened Steel Spring Bases Viton Seals Custom Grind Camshaft Comp Cams Hardened Push Rods 180o Thermostat Ported and Polished Throttle Body NGK TR55 Spark Plugs New Oil Change & Coolant New Header Gaskets Dynatech SuperMaxx Long Tube Header System Installation & Dyno Tuning Moser 12 bolt or 9in Rear