read somewhere that roller rockers are a waste of $$ in a stock motor under 5000rpm,@ this point mine is, found that Donny Petersen wrote an article bout them ,so I have that on order. I have to change base gaskets over winter & thot maybe some upgrades would be in order with 61,000 on her.local HD mech. said he may have put an Andrews 27 in & changed bearing with previous owner but wasnt sure haha.so that will also be looked @. thinkin a W6 cam & RB Racing LSR 2 into 1, 1 3/4 " Turnout. Any comments on either of those mods? am I seeing /reading the manual right ,roller lifters are stock ? how bout anyones experience with lifter block wear.