Normally the intake side would have the offset, but you can also have offsets both directions if needed. On the t&D race stuff, they have centered, .080, .170 and .250 lefts and rights. On the lifters, usually it is .180 offsets and do help. or if you have .904 lifters you can get .210 offsets. I have a set that is offset on the intake side only and centered on the exhaust, I think and easier way would be to have double offset lifters, then they can go anywhere and also you can swap them 1/2 way through the life cycle so that the intake is now the exhaust (intake lobe is more aggressive and wears out the intake lifter bearing before the exhaust.
One thing to look for is there are all kinds of "pivot" lengths on Jesel and T&D rockers. The FE uses a 1.600 pivot length which isn't very common. Most of the Jesel and T&D rockers for "cup" engines and the high end racy stuff, is longer like 1.75 or 1.85 pivot length, which won't work even if it is the right ratio and offsets. The "old" Cleveland has some that are shorter pivot lengths like 1.52, while the newer stuff is 1.65 or 1.75 or even 1.85 for the latest heads.