I guess I got lucky with my two 350's that I bought directly from the dealer in 98. One went into Mean Green, and the other in my dad's 79 K15 Sierra Grande, and neither one developed issues. Granted, these were bone stock, but they got ran good. No knocks, pings, rattles, low oil pressure, oil consumption, oil burning problems, flat cams, nothing in either one. And I cut the shrink wrap off of them, transferred over the accessories, stabbed them, broke them in, ran the piss out of them, changed the oil after 500 miles, and great engines is what I got. Maybe if I dealt with engine replacements on a regular basis I'd have worse luck?