Jalopy, once upon a time, the BBC roller lifters were taller and thats what we always used in the 250 and 292's. Just sayin' not to assume the SBC hydraulic roller can work, link bars might interfere with the top of the lifter boss casting. Also, other variables to consider is cam base circle, if it is small, around .875 or .900(from a reground cam for instance), it will cause the lifters to go deeper into the lifter bores and cause possible contact, but a base circle of 1.100" will make the lifters stand taller in the bores, but link bars could still contact. No one has used the retro style(link bar) hydraulic lifters yet to find out all the learning curves. It might be easy as pie or it might be something that can still work with a little modification. Somebody buy a pair of lfters and swap link bars and see.
