After replacing the DPFE on the 95 Windstar, I took the van for a test drive.
The codes to the DPFE were gone, but after parking the van I noticed that there was steam coming from the tail pipe. My question is.....any ideas about the damage to the engine? Head gaskets - cracked block.

The temp rose real fast and the engine is idling really rough at this point.

Anyway, thoughts?

I would use a pressure tester pump up the system to around 10psi start the engine if the gage pulses you have a blown head gasket. This is a picture of one. http://www.autopart.com/tools/toolsmain/tool/T_7050.htm
If you need an adapter use the search function. Most any independent will do them for you cost about 30 minutes shop time. Most shops are $50 to $100 per hour ask first. A radiator shop can check for combustion gas in the anti freeze.
If you do head gaskets pay a machine shop to do a pressure test on the heads. Use a flash light and lay it flat on top of the block cracks should be visible. Look closely between cylinders.