https://www.youtube.com/watch?v=24x7V...hannel&list=UL
I went from 604 to 704RWHP by changing the pulley on the blower and adding a longer air filter. Also installed a pressure port on the inlet of the intercooler to see what the DP was across the intercooler, ended up with 15psi difference. This set up in a buddies vette was making 817 to the wheels. Looks like it's time for a new intercooler.
The guy also went for a 45 minute ride with me with his laptop hooked up to tune in some of the drivability traits with this engine. I am always amazed at the new technology these days.