Pushed to about 4500rpms before shifting, instead of average shift in the 3500 range, was going a lot faster upon shift, picked up quite a bit of speed in the last 1k rpms, stock l20b in a 76 620 4spd. 0-60mph is a lot faster like this, motor sounds really nice past 4k, i thought the engine sounded topped out at 3200,didn't realize it would sound so willing and able past 3k. Still not going to push too hard too often, but it was fun lol.