Mancini Stainless Steel roller rockers

MOPAROFFICIAL said

273 could scuff.
Must have the correct shafts that have the oil feed holes in the right places to oil the adjusters, pressure point of the rockers bore aimed towards the spring.
I did buy mine cheap in 2006, like new $200 in murrieta ca...same day grabbed a rpm intake for 75, like new. Was a good day.
I've run them ever since. I replaced the Ohio crankshaft rockers with the comps.
I have some bushed 273 rockers as well from mopar performance "bushed for over 7000 rpm" with isky adjusters. Good stuff.
I also have some older prw,the flared pin roller ones. They dont clear springs with a od bigger than 1.460

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You'd be surprised how many shafts are installed wrong, even by die hard MoPar freaks. LOL. I like the 273s, have used them (unbushed) with better adjusters to over 7000rpm with no problems (flat tappet cams with 1.43"ish springs). I brake cylinder FlexHone them and polish the pads. I especially FlexHone the bushing-less Crane/MP aluminum rockers, they are usually too tight and that anodizing sheds oil (my theory). People bash the Ohio needle bearing rockers, but a friend insisted on using them on his 446" RB and has run it forever, with 8005A Isky double springs and a .588" Lunati solid flat tappet. Did a freshen-up after 3 seasons and everything (except the #4 main bearing, it was in the copper some) looked fine, no needle pitting or visible shaft flaking.