found a 7.5 inch stainless with 2 Mag-na-port 'ports in it and Wilson Combat engraved on barrel. Fantastic trigger! Anyone know specifically what Wilson did to it?

You'd really have to ask Bill. If you start with a good tight example you can reduce the full cock notch of the hammer, plus a little stoning here and there takes all the grit and creep out. Add a over travel stop and you end up with a pretty good trigger, perhaps not as good is the older S&W but very shootable all the same.

In a standard Red Hawk you've only got one spring to drive the hammer and Trigger return so there's not much to play with there. Some guys have swapped in a lighter spring and gotten along okay. But Ruger is pretty stingy with firing pin protrusion so I don't touch the factory spring.

No need to ask Bill.

Here is specs for the "R" series Redhawks:

Complete SA/DA action job with adjustable overtravel stop
All Contact areas are hand honed and precisely fitted
Mag-na-ported to reduce felt recoil and muzzle flip
Pachmayr "Gripper" grips installed
High quality extended eye relief handgun scope of your choice professionally installed
Shipped in MTM hard case

Price, in 1991, was from $380 to $545 depending upon which scope was chosen.

Also, your pistol looks to have Kimber rings on it. So, my guess is that yours was made before 1991 as photos in their catalog show Ruger rings on the Redhawk barrel.