Mike D + 1 ! (running rich)

Fuel Pressure Regulator looks shot - gauge shows 60 PSI !
My injectors (Ford high impedance) are rated at 19 lb/hr,
but at 45 psi ! At 60 PSI, they are delivering more like 23 lb/hr.

I used one that looks like this:
http://www.1800philes.com/tuning_article.html

Reset megasquirt with new numbers, and it ran, didn't seem to smoke, but started hunting. Then I saw the pressure had droped to mid -50's.
Megasquirt does not like it when your fuel pressure changes.

Considering one of those adjustable with built in gauge.

Coolant may still be a factor, I'll focus on getting the mixture right.