Wow! That is a really clean swap and it sounds really good. What did you do to get that idle?? What cam are you using? That engine looks like it came stock in that truck really nice job.
The is the classic Ford B303 cam and 1.7:1 rockers.
Best tip for idle is a quick step called "base idle reset".
Basically, set TPS to spec, disconnect IAC wiring, set minimum idle speed wherever you want, as long as it will still run. Double check that TPS is still in spec after idle adjust, then reset ECU by disconnecting the battery briefly. Hook up the the IAC wiring and battery, and you're done. If it won't idle or stalls, just bump the set screw until it will.
Along the same lines, I deleted the IAC on my Mustang 4.6 (with a solid metal "gasket") as the idle function is just silly. It would idle at 11-1200rpm while moving. I set it to 600rpm (it's stock internally) and the rpm drop as soon as I touch the clutch. I don't use AC and don't drive it in the winter, so it is okay this low. A more reasonable 750 would be easier to drive, but I like the sound idling low like that.