kickin and spittin

[mudchucker]

Hey guys, i was battling with this last year and now i am back at it this spring. I put in 24# injectors over the winter and it didn't change anything. When i hit about 3500rpm at WOT it starts kicking abd bucking and sometimes backfires. I can run it up nice and easy over 3500rpm, but not while i am hard on the throttle. I have a comp cam, cobra intake, 65mm throttle body, 24# injectors, and windsor jr. heads. any thoughts on what might be causing this issue? Also, i am running it at full advance, and i have tried letting the em auto advacne, but that doesn't work good at all. any thoughts are greatly appreciated. thanks