AFR says they are good for 550 lift. With the lift of 540 on the exhaust and my 1.52 rollers is this going to be to much for them?

.540/1.5*1.52=.547 so, Theoreticaly, .547 is less than .550 by .003" or (3) one thousanths of an inch. You need to measure that one at assembly.

-Mark.

IMO you are pushing it. Call AFR to be sure, and if they built a safety margin into their specs cool - if not then you might want to upgrade. If you subtract .016" valve lash from the published .540" lift then you are only at .524".

I broke the dampeners on my TFS heads using the 282s cam and 1.6 rockers. My springs were rated to .520" lift and I was only pushing .506" with the higher ratio rockers.

call AFR . . .

Will do. Thanks Eric!