Roller cam and turbo charging
I'm a little late to the party but I've got the Hughes hydraulic roller. It is a 228 / 228 with 550 lift and 116lsa. I've revved it past 7500rpm, and it purrs as low as 400rpm. I went hydraulic because it is not as hard on the roller lifters. Other than the turbo of course, I think this was the best upgrade I've done to my engine.