I've heard the horror stories of the FE solid roller lifters coming apart, but to be honest, a good set of solid roller lifters for a small block should last a long,long time with proper
oil/oiling and adjustment........
on my race car they are going on 7 years now, adjust the valves once a year,rpm range on the track is normally 3000 to 7000, I use Mobil 1
synthetic oil.........
My spring pressure on the seat is 225 pounds,running a .630ish lift camshaft.....
So far no problems of any kind......
David