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Message: <blockquote data-quote="Addicted" data-source="post: 1462822" data-attributes="member: 24638"><p>I was thinking of sticking my MHS cams (.556" lift) in my NPI heads since the engine only has around 50K miles. So Using a +.060" retainer will give extra room for this so coil bind will not take place with a higher lift cam, but I have since learned that retainer to valve seal clearance is .560" to .570". Seal to retainer clearance will never change unless I make modifications to me heads. So toss that idea<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite5" alt=":confused:" title="Confused    :confused:" loading="lazy" data-shortname=":confused:" />. Okay, now back to the original plan with PI heads. I had to take my '05 4.6L off the engine stand, and put it onto my roll around angle iron frame, so I could get my NPI on the stand. First I had to take the pressure plate/disk/flywheel, and I was surprised at how good the clutch looked so its going back on when everything goes back in the car.[ATTACH=full]4201[/ATTACH] [ATTACH=full]4202[/ATTACH] [ATTACH=full]4203[/ATTACH] [ATTACH=full]4204[/ATTACH] [ATTACH=full]4205[/ATTACH] [ATTACH=full]4200[/ATTACH] Took the timing cover off to see how everything looked and all is well. I wanted to take the heads off because I'm told it's .020 over slugs, but who knows for sure. My heads were line bored so id say it's true. Zoom in on the oil pump, where's it made at....Murica!</p></blockquote><p></p>