YOU NEVER SAID WHAT GEAR YOU ARE GOING TO RUN OR STALL SPEED OR IF YOU ARE GOING TO RUN N2o.I WOULD AGREE WITH THE FORGED PISTON IDEA. YOU CAN RUN A 9.5 TO 10 TO 1 COMP. RATIO AND RUN ON PUMP GAS. I WOULD RUN A MECH. ROLLER CAM TO KEEP THE COST DOWN OVER A HYD.WITH A GOOD STUD GIRDLE AND GOOD 7/16' ROLLER ROCKERS YOU DON'T NEED TO WORRY ABOUT ADJUSTING THE VALVES THAT OFTEN.WITH THE LOWER LIFT AND LOWER SPRING PRESSURE THE VALVES WILL STAY IN ADUSTMENT FOR A LONG TIMING .YOU CAN BUY ROLLER LIFTERS FOR $200 AND A CAM FOR A STREET CAR FOR $200 TO $275 WILL WORK FINE.I WOULD LOOK AT 245 ON THE INTAKE SIDE AND 250 TO 255 ON THE EXHAUST SIDE FOR DURATION.IT REALLY DEPENDS ON HOW MUCH N2o YOU WOULD RUN.I WOULD ALSO CUT THE CAM ON 112 LOBE SEPERATION.IF YOU RUN .550 ON THE INTAKE AND .575 ON THE EXHAUST SIDE THIS WOULD ALSO LET YOU RUN A LESS EXPENSIVE VALVE SPRING AND ALSO SAVE YOUR VALVE SEATS.THIS COMBO. WOULD WORK GREAT WITH A 4.10 GEAR AND A 3,000 TO 3,500 CONVERTER.