New to pt.net (been lurking for years). About to start a new build for my 03 ecsb z71 5.3. It will be a daily driver, nothing over the top. Here are my ideas for the build.
Slight port and polish 243 heads milled .030.
Head gaskets and bolts.
Hardened pushrods of proper length (checked after I install the heads).
New lifters and trays.
Tbss intake with fast TB adapter.
LPP headers and Y.
Flowmaster super 40 single in dual out.
Arm brute force intake.
212/218 low lift comp cam.
And a tune after

The questions I have are:
Are the ls6 springs seat pressure sufficient for this cam?
Is this cam the right selection for these mods listed?
Will I have to change my cam gear to a three bolt setup?
Would my stock injectors be able to handle these mods or should I go to the 8.1l injectors?
Is vengeance PCM a reputable tune or are there any closer to macon ga?
Anything else I left out?
Just trying to get my parts together that way I can do it all at once. I'd hate to get it all apart and realize I forgot something.

 

Yes, LS6 springs will be fine. That cam is a good tried and true choice. A 2003 5.3 engine should already have a three bolt cam gear setup, so stay with that. Injectors? Good question. Have your tuner check the injector duty cycles at WOT. If it's 80% or higher, you need to upgrade. I know people that have used Vengeance and they were happy. I can think of some little stuff, like new front pulley bolt (they're one time use), front seal, water pump gaskets, antifreeze, and do a oil/filter change afterwards. Optional things (should be done if you have a lot of miles on it) are oil pump and LS2 timing chain.

 

Thanks batboy.
I have most of the expendables covered (seals,gaskets,etc...).
Truck has 185k on it. If I swap to the ls2 chain do I or should I swap to the ls2 style chain dampeners?

 

im almost sure youll have to change injectors. id just go with some ls2 ones. i have a little bigger cam but with other similar mods an barely peak 70% duty cycle at WOT

 

No need for the timing chain dampener. If you do change the chain, then make sure to use a new oil pump o-ring when you reinstall the pump.

 

Thanks guys, I appreciate all the info. Now to finish getting all my parts together!