Hey fellas hope this doesn't sound stupid....but what do I need to install a set of roller rockers on my 400 sbc? The 400 has aluminum heads and 2.02-1.60 stainless valves, edelbrock eps intake, holley 750cfm carb w/ vacuum secondaries, crane 292/512 flat tappet cam, hydralic lifters, stock rockers and pushrods. Any info would be appreciated, also is adjusting rollers the same as adjusting stock rockers?