Roller tip rocker arms??? Brands?

big block... harland sharp is the best for the money. jesel is "supposedly" better but doubtful and costs a whole lot more. HS's are expensive enough. next best after HS is the hughes engine package. if you go lower down the line you have 440 source, being cheapest and most likely to give you migraines. i've also seen people having problems with cranes/compcams mainly because they have a few get by quality control that are not so good and it's difficult to get resolution over the phone. harland sharp = most are quite satisfied. they work, they last, they fit (they all should be cleaned well as shipped before putting on your engine however)

small block... someone else chime in, i'm not sure who makes the best anymore. the stock adjustables from a 273 will probably be fine for street engines, but for race you may want roller rockers / 1.6 ratios / etc.