I once read that the stock ZF was good for about 550 horse power. I am not sure if that is 550 to the ground or at the flywheel. My 388 Fontana block stroker engine is making close to 600 horse power at the flywheel, and other than the typical ZF ring gear safety wire modification, I have not experienced any problems. I don't drag race my Pantera, but it has been on a road course a number of times and is driven on the street quite a bit.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.