Overheating? Can be caused by many things. Basics.
#1 I would first off pull the thermostat and try running without
one. Later replace with say 160 -180 range.
#2 Backflush the engine and radiator. I'd tell you to check
coolant level, but you will be refilling after you complete steps
1 & 2.
Performance Mods? Sorry, but I can't help you there. I am new to Ford Engines and just feeling my way along also. There are others here though that can and will offer good advice willingly.
Chassis Dyno? Try the locator at this site
http://smokemup.com/
Good luck,
Bud