Fueling & Injection - 2 Questions... Injectors and Fuel Sys Upgrade...

What injectors are best to use with stock pcm... some where in the 42-48lb Range.

And at what RWHP lvl do I need to get rid of the stock fuel lines?

Looking to see ~500-550 Rwhp out of my 409 NA thanks...

409 na will be fine on the stock lines...some folks sre oner 600 with a Walbro and a boost-a-pump. I'd buy the 42lb green top Bosch (50 in a ls1) or the 60lb mototron.

should be ok on stock lines but i would upgrade when i could,