mechanical

I have a 92 foxbody. I see quite a few t-56 transmissions out of 03-04 cobras up for grabs but am not sure on how to convert the speedometer. Can anyone give any advice on how to swap the electronic speedo out to make it work with my mechanical one or any possible routes to go about making this...

So i bought a mechanical oil pressure gauge from summitracing but i'm not too sure as to how to hook it up. Summitracing told me i don't need a sending unit since it's not mechanical. I'm no expert on gauges so if this is wrong, can someone please enlighten me. Also, where does the line...

18" Flex-A-Lite Fan #1518 with Flex-A-Lite Spacer #14538. Comes with everything you need to install. Summit has them listed for $54 for the fan + $16 for the Spacer. Get them for less! $50 + shipping