ok, heres is the cam im deciding on for the ole 4.8.

54-412-11 XR265HR 265/271 advertised 212/218 @ .050 .522/.529 114° LSA

can i use some ls6 springs i have, or do PAC1218's? Im gonna order some 7.4" hardened PR's, but not sure on the springs.

 

You CAN use ls6 springs and they should be fine. But if you want extra security then get the PAC's

 

do pac's, and then if you want to go bigger on the cam, then your covered on the springs....

 

Ls6 will work, but i would get a heaver spring in case you ever want to up cams..

 

LS6 springs for 2 years or so for me. Can't go wrong with stronger springs...depending on future goals.

 

I've been running LS6 springs for a few years, but my cam's puny. This 5.3 shouldn't ever see a cam upgrade while it's in my truck though...there's an LQ9 in the works As for the 5.3...maybe it'll end up in a street rod some day (or in the classifieds)

 

I've got a set of NEW LS6 springs Holler if you're interested

 

ls6 yellow springs are rated at .550 correct ?

 

560-570 lift

all depends on what the seat pressure needs to be for the cam

 

I got the same cam and I'm running yellows. It will be fine no reason to buy million dollar springs with that cam. If you decide to upgrade then buy Pacs later.