7.3 which clutch

[ernie88]

my clutch let all the smoke out of it yesterday and need a new one
from all my reading probably a single mass southbend clutch kit
buuut when i called lordco they had 5 different sizes for my truck
now i dont know which one
1994 ford f-250 idi 7.3 not powerstroke
or how can i figure out by serial #'s or whatever
thanks