youre right exactly the mechanic sells the parts lol.thats why i joined the forum ,and i do appreciate the info.do you think icould use 4.10 or something to help pull that trailer ,i dont think the cam is going to do the trick .when i get rid of the hyp. power programmer will the custom tune take it s place in a way.shift points etc:i do have a built 4l65e thatll put youre head in the back seat ,because i just got the trailer when i blew it ,hummm wonder why.

 

4.10 will help if it's just around town... On the highway, your milage is going to suck...bad...

If you're gonna be doing a lot of highway driving, it might even be beneficial to go wtih 3.42's or something along those lines in order to keep your rpm's down at higher speeds...

In all seriousness, I would go with longtube headers, cold air intake, some type of straight-through exhaust, and look into the Comp Cams XR265HR... It's a 210/218 .522/.529 on 114lsa. It should give you nice results with a computer tune...


www.nelsonperformance.com

Allen does a fabulous job tuning from a mail-order tune perspective. Give him a call and he'll be able to tell you more exactly what you need the most within your budget.

 

The custom tune will let you adjust everything from shift rpm to shift speed and pressure, fueling, timing, when your tq converter locks and unlocks, etc.....everything.

4.10's might help some but your 3.73's aren't bad for towing and still getting good MPG.

The right cam will make a huge difference in low end tq or high end hp depending on what you go with. 35hp/tq are not uncommon from a cam swap.
Swapping to a 6L will solve all your problems

 

You need to slow down on your typing but everything these guys have mentioned is right on par. Hopefully you'll take it for what it's worth. Did you already buy all those things and if not what's your budget? It'll help prioritize which installs are more important.