The first thing I did was add a trans temp gauge and tach to our new to us '99 Jambo.
This shows what they would look like:
http://www.egauges.com/vdo_acce.asp?Subgroup=Ford_Van&Cart=
I i-net shopped around for a better price on the pod, and went with GOOD brand gauges.
Spray paint the pod to match the decor. I had my wiring done by a good Ford shop.
Knowing how hot the trannie is, and watching the shift rpm = piece of mind.
Hope this helps
Ford