Okay this is what i have to work with...
04 2X4 5.3 4sp automatic 1500 silverado RCSB 3.55 locking rearend stock i beleive eaton makes it.
upgrades to date:

46 lbs injectors
procharger with 2stage intercooler
275/45/20 Tires
pcmforless custom programming
SW headers
true dual dynomax mufflers
cooler NGK Plugs of course

The choices I have to do next:
0 or 3.10
2000-2800 torque converter
mass air flow sensor
Throttle body
Air intake
rack and pinion 3.90 or 3.10
or trutrac posi with 3.9
Later upgrades:
leingenfelter heads and cam

please let me know which will make my truck noticable faster i'm going to do two of the above upgrades next month. I like performance but I don't know very much I want to be able to somke a stock lightin and SRT-10. Suggestions please.

 

Cam, gears, and stall will be your best bang for your buck and make a very nice difference too...

 

what stall should i go with if i still want to drive it everyday for short and long trips say with gears.

 

id go with a 3000

 

Def. put some money in the transmission, get a good PI, Fuddle, Yank converter 2800 stall and put some cash in the transmission becasue your gonna need it. Then when you get the transmission strong enough to were its gonna support the hp your gonna make, then do the heads and cam (btw great choice for cam ligenfelter makes in my opinion the best blower cam out there). If youve got 3.73 gears I would stick with them and invest in a Eaton and possilbly while your in there new moser axles. If you dont have 3.73's then I would do 4.10 at 70 my fathers truck 2500hd does around 2400-2500 a 70mph which aint that bad.

 

Oh my bad 3.55 gears I would do 4.10s last.



But have you ran a stock Lightning or SRT10? You should be making around 380ish to the wheel that would be damn close to what it takes to run against both trucks.

Your wasting your money on a 400 tb or a new intake. Like weve said stick with the converter, transmission, heads, cam, headers etc that stuff makes a difference.

 

What type of transmission upgrade do you recommend besides a 2800 stall. I really don't know shiiiit about this part. Please provide detailed kits that will hold up to a final hp of 500hp at the engine.

 

FLT Extreme Duty Level 5

 

Yeah, go with the FLT level 5.

Or things to look for are Red alto clutches, Kevlar lined bands, but you get what you pay for. Just depends making 500 crank hp with a procharger is easy, you wont even need heads or cam. I know a guy with a ex cab with Procharger 5.3 with Ligenfelter heads and cam forged piston, and rods (Bored to a 5.7) and makes 600rwhp. There is only 1 place I would buy a transmission whole from and its FLT.