Just bought some autolite 3924 plugs. How do I figure out what to gap them at?

 

0.052- 0.056 " is the range for the 87-04 Mustangs...mines at .054 which is stock for my 92 gt..hope this helps

 

how do i figure out if thats what i want mine at?

 

you would be able to find the gap specs from a haynes manual or even in the various mustang forums...054 is the recommended gap for my 92 i think it would be safe to say it would proly be the same for your car...