help with 83 5.0 cam

ok guys i have a problem i wanted to buy a new cam for my car i had a bone stock 5.0 put in my car when my other motor when bad and i cant figure out if the motor is a roller motor or not so i dont know which kind of cam i would want but basicly i am trying to find out as much as i can about the motor if you know anything about it it will help it is a 1983 5.0 out of a mustang not sure which model but for sure a stang so let me know if you can help
thanks
dan

i couldnt find any numbers i thought they were there i knew chevy use to do that but someone told me for didnt so i dont know where to find them but i know for sure it is a 1983 mustang motor i just dont know much about the motor so i am tryin to find out as much as possible my main consern is the cam i dont want to tare the motor down to find out i dont have the cam i want in the car and have to buy more shtuff but let me know if you know anything