a 50 shot is pretty safe on my engine right? It has all stock internals, But it does have the factory forged steel rods in it... too bad the pistons are only aluminum alloy.I think most of the engine problems is a result of drivers hitting the nitrous and shifting at like 6500 RPM's correct?

 

50 shot is pretty safe. It'll prolly give you a 35 hp kick in reality if that even. You will be ok with stock internals. The reason people blow their engines with nitrous is because they don't retard the timing with gobs of nitrous, it leans out and burns the pistons, or there is just simply too much power for the internals. I think the most you'll want to do on a dry system is 75. and 125 on a wet system. Then you'll need a timing retard everytime you use nos up and beyond.

 

I think what you mean to ask is "Dry or Wet" not "Dry or Direct". Direct-port is having a nitrous nozzle in each individual intake runner (4 on a 4 cylinder, 6 on a 6 cylinder, 8 on an 8, etc.).

The best way to go (IMHO) would be a wet kit. Dry kits are somewhat more simplistic to install (less lines, not tapping into the fuel system, one less solenoid, less wiring) but once it's dialed in the fuel is there when you need it instead of taxing your existing fuel system to compensate for a dry kit. Either way you have to accomodate the extra oxygen being introduced into the motor, but wet kits are typically a little easier to live with/reliable once you have the nozzle jetted correctly.