Re: 5.0 question
towncars, Crown Vics, and Grand Marquis were rated 150 hp stock except for those that had dual exhaust. the differences are in the heads and cam. truck cam has better torque and mustang cam is more performance. towncar cam is different than ho type cam in firing order and stuff. you would do best by going with an explorer 97 or there abouts for the 5.0. it is a HO engine with good setup and not beat like a mustang and has gt40 or gt40p heads.
my 1986 Grand Marquis LS... Rose...