Seeing I'm nasty young man.
Sr20det. One t
Turbo cars drift very well. As they have good torque.
Turbo lag, factory s15 isn't laggy at all. Boost comes in at 2,000 to 2,500.
Turbo computer.... I think you mean ecu or ems.
Hks Turbo.. just get a GT2530 from garrett (Ball bearing T35 compressor & t25 exhaust). There cheaper and will give you excellent mid range power.
Cam shaft, there no point touching that. You would do adjustable cam gears before ya touched them
As for drifting, no need to make the front liter. Just take the spare tyre out to make the arse liter
And hard suspension helps