budhayes3

iTrader: (19)

Here's a thread of mine that might help you out...I bumped it to the top too

https://www.performancetrucks.net/fo...55#post4303755

LS1FREEK

iTrader: (1)

my bro is runnin the stock length 7.400 pushrods on his 5.3 with .030 milled 706 heads on his 5.3... he had a b1 cam and now has a 232/236 .595/.601 112, both were run on the milled heads with 7.400 push rods... No probs..

Mangled03gmc

iTrader: (95)

If the stock replacement lifter is now the ls7, what if you go to have a lifter fixed under warr?? They are going to stick the new ones in there.. There not going to replace all the PR's too.. From a quick search it seems that diff companies say to use a diff pre load on the lifters, also guys have switched to the new style lifters and still ran the 7.4 PR's with out any issue.. I have my heads milled .020 and am running 7.4 rods, without any probs or noise.. But it would be best to MEASURE since you are going with the new lifters and a decent mill job Again the lifter will be able to take up the diff + or -.

junk racing

this motor is going in an S10, no warranty here...i think im going to just buy the checker and be sure dont want to buy everything over again, or hurt anything

Mangled03gmc

iTrader: (95)

No the warranty thing was about if it was under and something happ. Even though the lifter are diff gm never said that it was mandatory to switch to a shorter one if a old(ls1) one was replaced... Like I said you it would be diff, get the checker...

budhayes3

iTrader: (19)

I'm guessing that the LS7 lifters still keep the preload within GM's spec so they can re-use the factory pushrods. I'm sure that the General doesn't want to spend any extra dough for pushrods on warranty jobs...especially since the factory doesn't offer a shorter pr.

You make a good point in post #15...this isn't a warranty lifter replacement situation, it's a build with more variables

lucky77

iTrader: (4)

gonna get a pushrod checker also.. to be on the safe side... I dont want my **** to fail again...