Doing some msg board searching, it appears as if a similar ford part off a 90's Cobra might be better.
Didn't find it available anywhere though...
F6ZZ-9A486-DA

One guy seemed to be blowing 20A fuses, Buit I'm not sure on his setup. There is some internal foam on the GM units that may restrict it, and it is suggested to remove it.

Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater