I'm kind of in a similar boat. I pegged the thermostat all the way to the right this morning. I took it to Autozone and it looks like I've got a leak somewhere in the radiator itself, all the hoses looked ok. Just chillin in the parking lot a large puddle of antifreeze formed beneath my car.

The guys at Checker wanted $175 for an OEM radiator.
NOPI has Fluidyne's for like $360 + shipping. (Anyone have one cheaper?) I want to go FI in a year or 2, should I upgrade to the Fluidyne?