how do i correct the speedo

[93 coupe]

i got a 93 5.0 with 373 gears, and my speedo is way off how do i fix the speedo? doese any body now what i need and where i can get it? thatnks.

[Gt]

You need to order a 23 tooth speedo gear. Any of the mail order stang places can hook you up. $10-20 for one.

try www.uprproducts.com