I have heard anywhere from 550 horsepower up to 850 for a ZF. This topic gets debated once in a while with the Pantera group, but it all comes down to how hard you shift it and how sticky your tires are. A Pantera is not the best drag racing car around, although there are a few guys that have gone very fast on a drag strip in one. I don't intend to drag race the car and with the potential power output of this engine, it might get a little wild in the first couple of gears. The last engine in the car was a CHI 2V engine with about 400 horsepower and it ran quite well. I expect that this stroker engine will make more power, but won't be dangerous unless I get stupid. I should have some engine dyno numbers before the end of the year.