Some years back a friend of mine had me come to a place he was working at, to try to start one that was on the ground. The owner wanted it to run to sell it. Don't remember what 855'ish thing it was, it hat top stop injectors and a miss timed pulley and is why the supposed expert at the out fit couldn't run the over head correctly, especially the injectors. The can of worms! There is only one method that takes into consideration of an improperly ground or worn cam or other components of the valve train. Yeah got it running.
Edit: Other components related to overhead, not just valve train.
Someone didn't time accessory drive, that was the issue. It happens with inexperienced mechanics. As far as a issue with the cam----depending on which engine CPL determines cam. All Big Cam I's, II's & III's use the same cam which the part number has been superseded about a dozen times. The MVT II's & III's use a totally different camshaft. The MVT's are a air/oil pressure operated cam follower totally different than standard follower. The main reason for camshaft deterioration is too much fuel/rail pressure being exerted on injector follower lobe. Max/safe psi is no more than 200 psi, stock is usually in the 155 to 165 range. Average stock CPL449 is 158. 10% over fuel puts it in the 188 psi range so max over fuel is around 14 to 15% to stay within 200 psi. I have only ever seen one cam improperly ground, it was a Cleveite brand. The MVT was a retard/advance system that was before STC-Step Time Control. On MVT engines with twin turbos it wasn't uncommon to see 50 lbs boost, those were 475 hp. Broke allot of head bolts those did.