The problem with solid rollers is they don't
oil well at lower rpm, like a street engine typically sees. That's what I've read about while doing some research. This MAY have been addressed with the newer solid roller lifters but do I want to take that chance is the question.
I like the idea of less friction in the roller with the RPM potential of a solid lifter, (I also like the chatter but would NEVER pick a cam based on it's sound!) but is it going to stay together in an engine that sees street use as well as track use... not sure. Safer to just use the solid flat tappet.
Larry