So I just purchase myself a 99 firebird with 246k miles about a month ago. It actually ran really nice once I changed the manifold gaskets/plugs/wires/coils. Wanted to beef up the engine and try to hit 300hp. but i just wanna stay NA and I'm reading a 3800 wont really get much better without some boost. Now one of the rod bearings has gone out and i got some knock(sad day). I wasn't thinking about swapping engines so soon but if I gotta drop the engine out I figure I might aswell just swap it now rather than later even if it might be a bit of a hassle. I want to try to hit at least 400HP. Anything more than that will be icing on the cake. I want to be able to have the car reliable and daily driven yet also survive a day at the track(mainly drifting/circuit).
What I'm trying to figure out is what parts exc should i us to achieve this. Should I stroke it, bore the cylinders, both, or neither. I've read a ls6 heads are good and to get a aftermarket camshaft rather than using a ls6 cam. I've read that they can have oil starvations problems at times, anyway to combat this? been seeing stuff about gen4/ls2 lifters aswell.
Literally any info would be appreciated greatly as I've never done a swap or engine build before. I've only ever just fixed what broke on my vehicles with new stock parts.
(sidenote. i do understand the 5spd will have to be swapped for the 6spd aswell. probably the dif too.)