'''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Almost all carbon forks have threadless steerers these days so you will need a new headset, a new stem and some spacers to adjust the stem height before cutting the steerer to length. If the steerer is also carbon, you will need a compression plug to set the headset adjustment as a star nut cannot (read; MUST not) be used with a carbon steerer.
Are your current stem and steerer 1"? If so, you will have a more limited choice of forks as most are 1-1/8" these days but 1" is available.
Check out Park Tool's web site for info on both headset and fork installation.