Fresh engine, wiped cam? Tick? (new pics added)
What ever the block and heads were cut as a total , is what you will have over stock pre-load.
Example: .020 cut on head
.010 cut on block
=.030 total metal is gone.
You then would use a .030 shim under the rocker arm pedestal.
Stock length push rods are still used in this example.
Find out what the total cut is and run the shims needed.
Buy new lifters and your done.
Check your lifter pre-load when everything is back together with the new lifters.
I used the same lifters summit sells and so did my freind with a 273 and they worked fine.
We bought are lifters from paw but i think they are the same part # at summit racing.
Like i said before, my other freind with the 340 just had a bad lunati lifter.
Both motors were put together this year.
Maby lunati is using crap lifters.
ps \\ have lunati give you your money back on the lifters and that will pay for them.
Hey they might give you a new cam and let you keep the one you got.
When it comes down to it ,your a paying customer that got junk.:angry7: