I ran a similar solid roller in my old pump gas duster, it was 260@.050 int. lobe with .420 lobe lift and 266@.050 on the x. lobe with .409 L.L. ground on 108LSA installed at 106 and later at 107 ILC.
That rascal ran really good in that motor with both 9.25 to 1 compression ratio with a set of big valve 906 heads and a low deck Eddy six pack intake with a set of 1970 440 six pack carbs. at 511 C.I. and ended up later with 1.0.78 to 1 comp. ratio with a set of Indy SR M.W. ports and a 400-3 intake with a 1050 CFM Holley Dominator carb with 517 C.I.