I don't think a 376 mm a-c fork plus external headset cups would make it a lo-pro. I think it's an excellent idea. Play around with this and see what results you get?
http://leagueofbikepolo.com/forum/gear/frames/2013/10/10/fork-swap-geometry-calculator
@russmeyer started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I don't think a 376 mm a-c fork plus external headset cups would make it a lo-pro. I think it's an excellent idea. Play around with this and see what results you get?
http://leagueofbikepolo.com/forum/gear/frames/2013/10/10/fork-swap-geometry-calculator