I had a 93 5.0 T-Bird that was super-clean. The only issue I had was cooling. I didn't think that the 1-row aluminum was doing the job here in 100 degree SoCal. You really can't (or couldn't) find an aluminum upgrade (at least not without spending 600 BeCool bucks), so I had a custom 3-row brass and copper made. But it didn't help. I was also running a stacked plate oil cooler out of an 80's Crown Vic police interceptor. Still not enough for me. I finally came to the conclusion that the problem wasn't cooling capacity, but airflow through the radiator. The extra little slots that Ford snuck into the grille/bumper should have been the tipoff, but the packed engine compartment just wasn't letting enough airflow through the radiator, particularly at idle. I ultimately added a big electric pusher fan in front of the radiator junk-picked out of a Mercury Merkur, with a Hayden thermostat/relay kit set to keep it around 185. That worked pretty good. The bottom line for those of you out there with V8 MN12 Birds -- follow my steps in reverse: extra electric pusher fan in front of the radiator FIRST, then a radiator or oil cooler. An electric Black Magic or equivalent behind the radiaotr in place of the mechanical clutch fan might also be good, since you could sh*t-can the huge fan shroud, which almost completely sealed the engine compartment. Take my word -- airflow is the key -- it took me a year and some bucks to figure this out.