Probably less than 70- - - -depending on wind drag, rolling resistance, power loss through the fan, the trans and rear end, and a few other factors. Thermal loss through the cooling system also drops the flywheel HP, but that's possibly taken into account in the flywheel HP rating. Over-cooling a high performance engine with aluminum heads and a big, efficient radiator actually robs available HP from the rear wheels.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!