[DAVID GAGNARD]

If your motor does make an honest 350 hp at the flywheel then your loss thru the drivetrain is about 25%, not that good but not that bad............it all depends on a lot of variables of your drivetrain...... and how it's set-up........different transmissions absorb different amounts of hp,likewise for rear ends.......then you also have your water pump, alternator and any other acces. hanging on the front of the motor...........
Lightened, polished rear gears such as found in NASCAR will make a difference as well as how they are set-up.......same goes for tranmissions..........too many varaibles for a "blanket" number to go by......

with that said, I should be able to tell you in a couple of weeks what my 65 Mustang road race car will do........I've had the engine on an engine dyno and in a couple of weeks will be going to a chassis dyno....... I'm running a custom built road race toploader thru a 9" rear end with an aluminum driveshaft connecting the two, on the front I only have a high volume aluminum water pump and a 60 amp alternator all with race under drive pulleys.........

I'll report back on the findings as soon as it's done............

David