it runs 10.20's with a full interior, 3.91 gear, in a 10x 26 inch tire car. I shift at 7400 ish. traps 126-128. our track is notoriously "slow" as the last 1/8 mile is uphill. it's been a great engine. I have dyno sheets with 618HP @7400. before i switched to E85. Heads flowed a best of 290 on a 4.030 bore around 700. the whole downfall of these heads is they (mopar) advertise flow numbers on a R block bore. the valve was a little shrouded on a 4.030. They were just more $ than they were worth, or the extra porting i have into them. Maybe if i had an R block they would shine more. But in the end...could have bought an off the shelf set of RPM's, shipped them off, and got the same 290, without the goofy custom valvetrain.
