do they make a roller tip rocker for the chevy 250

I have a set of Harland Sharp full rollers that I intend to use on my 250.

what size are they?

Harland Sharp rockers are 1.75 But WILL NOT WORK
with the stock cover.AND #1 & #12 need to be rounded off to even clear a After market cover

Not a problem for me. I'm making an adapter to fit an early 50s GMC cover.

Comp Cams at one time listed a stamped steel roller tipped rocker for the 250 engines. When I was building mine I called them to inquire and was told they do not make them. That was almost 4 years ago. I didn't persue it with other cam makers. I just went for the big bite and used full roller rockers and the work that additionally goes with using them.

Comp cams still has one that does work with Our L6s. I'm now useing the Pro Magnum full roller rockers on my New motor. NO Mods are needed.

Crower also makes rollers for inlines, but they too require valve cover mods or a 235 cover.