Well I finally found the stats on mine and it's a Nations TAD-275XP. (275A)
They have upgraded those to a 300-SPX which is built even a bit tougher. Used on emergency
equipment and military applications, they idle at 200amps and are designed for high heat.
They have a 12 diode rectifier system and are supposed to be a direct drop in fit.
Cost = $519.00
Good luck on what you end up with Joe.
The 275 I installed did need a slight mod to fit
flush with one of the brackets that Ford
when they put one of the
stock units in before I upgraded
BTW, makes sure you get the right nose pully and that it's torqued correctly.