Hi Willis Welcome to the Gadgetman Groove forum.
Makes sense, Get some spare TB's to fit what you folks have, and work indoors! Study the Training DVD, this forum, and look in the Index tab top left corner of the forum, loads of topics/info in the Index.
first what you need, basics: Dremel 4000 and flex shaft attachment. eye goggles MANDATORY always use em. good lighting. JB quick, or other fast setting metal epoxy. I use power steer. oil in a cup to lube/cool bits. 1/8" drill bit good for roughing up aluminum before applying epoxy.
Patience. go easy when Grooving, I usually use med. speed or little less on dremel, and dip bit in oil, holding ball end under oil couple seconds to keep it cool, gotta protect those bits!
Good news for you guys is, overall, Ford's are easy to Groove and respond very well to it.. Only question I'd have on the '90 Ford is if the Throttle body is removable from intake, or is it integral to intake casting? Also the '90 is from the OBD-1 era, the "dumb" computers, we can "get away" with a lot w/ those in general.
So Welcome Aboard! With Age comes Wisdom. BTW, buddy I ain't all that far behind ya!
Tracy G
Gadgetman Reno Certified Gadgetman