Quote Originally Posted by BBMonte
i am going to end up ruining 'NOS" when i get this engine ruining good in my car, now is there any things i need to conceder now wile i am putting it together? and what do u think would be a good SHOT?

and who makes a good system?

BBC 402 .030 over
cam is 216/216/.050 with 515 lift
9.5:1 compression
Speed-Pro Forged Pistons
Eagle SIR I-Beam Connecting Rods 7/16 Rod Bolt
Edelbrock Performer EDL-2161
Elgin 21-4N Stainless Valves Intake & Exhaust
Nodular Iron Crankshaft 2 bolt mains
Your cam is not really the best choice for N2o.
You should look at cams that favor the exhaust by 8 degree's for a starting point and are cut on 112 L/S.
If you have good head gasket 175 shot is fine.
Run it rich and take a couple degree's total timing out of it.
You also may need to go a step colder on your spark plugs.