Decided I'm going with a Hyd Roller now that Hughes has the new hyd roller lifters out. Still need to figure out which one. By my calculations (1.850 inst ht- 1.090 coil bind- .060), my coil bind is at .700, but I don't want to go much over .600 gross lift. I'll get a new converter if I need to. Lunati has one, 60412 (not on their website yet), that's 231/239, .535/.550 (.589/.605) 110*LSA that I'm considering, but the duration seems low.