[QUOTE=
1) port/polish the head
2) Fit 3-2-1 exhaust headers
3) High-flow cats (still trying to asses if these are even worth while to be honest, I'm curious if they will help more so because the cats are 10 years old vs being actually 'high flow)
4) Larger injectors (need to investigate cycle performance of the current ones, reading that at this point they are at max)
5) Further cool air intake (no idea how, need to figure out)
6) E55 fuel pump
7) ECU tune!
8) Karmaan camshafts[/QUOTE]

1.don't open the engine( if you do u will take off over 100000 mile life of the engine
2 exhaust does not help ,,but exhaust and headers will help.
3. with headers and if needed high flow cats are the way to go.
4. don't waste your money,, nothing to learn there. ( u already know how to do that)
5. a engine is a air pump u need it get air in and out needswings intake ,headers, exhaust
6. not needed, you could put a regulator (needswings fuel setup) increase fuel pressure to 65
7. yes but get a dyno tune ,,it is worth about 10 to 15 more hp than a can tune (on a srt)
8 again don't open the motor ,remember this is a hand built engine ,if you disturb it , you lose it.
9. change the rear gear ratio,, u now have a 3.27,,for faster top end /better gas mileage 3.07,,or 2.89 ( if auto u need tcu),,, to go faster from light to light 3.46
10. one step colder plugs.

jim