Questions about a 2006 5.7

ok, 3 days in, second set of pushrod length checkers purchased....... you would think that when you cannot get your fingers in to adjust it, that you might be able to get a wrench on it, but nope. So, you search Morel on the internet to get a customer service number, and it goes to Callies, who is in charge of Morel lifter questions, just to have them pawn your call off to companies that sell their lifters. So first call, an engine shop in IL, figuring stay close first. Wait for a while, then the guy picks up and says, you want 1 to 1 and a half turns on the rocker after zero lash. I enlighten him to tell him that these are shaft rockers with no adjustment. He sticks by the one to one and a half turns. I tell him how the Morel instructions clearly say to do the math, figure out your threads per inch, figure out how much a lifter will preload with each turn, and use their figures of .030-.035 for a cast iron block and aluminum heads, so there is a number. He wont get off one to one and a half turns. I put the M8x1.25 rocker shaft bolt in a thread checker, and go a full turn and it goes about .050-.060, another half and its .070. Sounds like too much. We had a good conversation about how I expected every thing to grow and get hotter, but apparently the heads are expanding more which make them clatter when its hot. We got to talking about old time hemis and adjustable pushrods to set lash on solid cams and he said they could make me a set of those. I did not ask, but sounds like the answer over buying multiple lengths of push rods.

So I back off a few hours, get to do some real work, come back and see Howards cams is one of the representatives. He says, how new are the lifters? Come back to this thread to figure about 6 months. He says, they had a number, but their new lifters they are suggesting .060. So apparently, if you buy their new lifters, you are going to be off .020 from the get go.

I guess I should have tried to measure these before christmas when the elves were around.