First question will any ford 19lb injector work in my truck? ex.
http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=601055987&r=0&t=0

Second, I want a speedo that has a higher top speed. I need to replace the gear to adjust for my new rear end any ways. Could I goto a gear that would make my mph match up with kph and get a kpm gauge over lay?

your local ford dealer should have the speedo gear you need. you should probably try them first. as for the injectors, i have heard some work and some dont. i think the 19's out of a 98 crown vic will work. something about being a returnless fuel system or vise versa