Roller tipped rockers aren't really a necessity... lots of good discussion about them over on www.speedtalk.com .

I have a set of T&D's for my small block but I think I'm going to stick with my iron rockers for 2018... simple and effective. Maybe if I stick with that small block deal after next year I'll use the T&D's.

I'm not overly worried about the juice lifters on the Gen 3's, either. No experience with these new engines right now but my plan B for 2018 is building a simple 5.7 for a back-up and see how it works. I need to be at 650 HP or better and it will be on a dirt track deal.... we'll see.