97 explorer with no factory speedo. I see these kits on Ebay for $40. anyone know if these are any good?
Buk

 

Which kits you talking about?
If it's the "factory" polaris kit your talking about, they're a great deal.
I bought one for my 98 Xplorer300... bolts on & includes all the parts you'll need.
It's a little tight getting the Drive hub on the transmission, but i managed it without removing any parts (mine's a chain drive)