I think you must run an EDM lifter with the recent oil issues and flat tappets.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lynn</div><div class="ubbcode-body">The 143 runs like stink.
But, and this is just my opinion, and only because you asked. The less you drive it, the more likely you are to wipe a lobe. I worry about it every time the Z goes more than a few days without being started.
I am sure there are grinders who can get you something very close (with maybe just a hair more thump) to the 143 in a roller cam. Nice peace of mind. </div></div>