how much hp can i get???

hey,
ok im not wanting to turbo for at least another year if not more right now, i want to work on body and interior first but i really want sum xtra hp tho. could anyone tell me wut they think i could approx pull from these few items?
timing gears
pully set
headers
full catback exhaust
msd coil pack
i already got cold air and iridium plugs and msd super conductor wires to start. and also if anyone knows sum easy hp upgrades other then wuts on list please let me know. i mean easy more as in like i listed which is basically bolt on performance. but im tryin to squeeze as much power as i can without anything thats as extensive as turbo or tearing into engine. as i said ill prob start those things next year or around then. thnx josh

and im not totaly sure wut my stock hp is either, its the 420a motor. so if anyone know let me know and mybe i can figure out wut hp i could reach with sum bolt ons. thnx again josh

140 HP.
http://www.****s.com/model-guide/

Turbo or nitrous is the only way to make real power. Those mods you listed would add around ~30 HP. Your best bet is to save money for forced induction. Just my .02 cents.

if your on a budget go with a stage one upgrade or if you have money of course a stage 2. um if you want to know how much hp you can get or what you need as in parts for your specfic dsm i would recommend looking into the website that most ppl in here have posted. once again it is www.****s.com