summit.jc whitney both online.geez i went in for a new fan and asked to see the good ones, they didnt have any(modern parts stores)especially for serpentine drive 302. they brought me the stocker. i went home with a 351 fan clutch and repaired my old fan that was bent and had broken rivets(it got my hand and didnt even cut me, but man did it hurt)i took it to above 6000 rpm regularly since it was nothing but a 1/4 mile rocket.be careful ordering sight unseen, i know summit has a tech line.
If your not a do it yourself type and want a quick way. just go to ebay and type in ford strokers, and you will find engines ready to set in your car with 4, 5 or even 600hp and it is less of a headache than doing it yourself. And pick yourself up a muscle mustangs and fast ford magazine at your local walmart, it has a lot of companys that specialize in mustang engines. Good luck.