The 6776BB is super streetable with stock heads and cam. With the right converter it will spool a little slower than stock, but comes on like gangbusters. At 5 psi, my rpm's are at 3200, and at 10 psi I'm seeing 3600 rpm's. That's what someone should be looking for when using the 6776bb turbo. I don't know what it runs 'cause I have no time to get it to the track. 52 nights in a row at work is the cause of that. But it's also causing me to buy a set of heads and a roller set up. Looking for 10.9X's on pump gas and alky. Should be able to do it with low boost.