There was a thread a while ago about "5 best boat improvements" and if you check around page 3-5 you will see discussions of old wheel pilots that some of us have. Mine's still cranking along, and I had a chance to test it on a 50 mile run to Ocracoke in a following sea a month ago, and it worked great. It'll handle the 32-34 foot TT's or your GB -- - don't know how much larger a boat it might drive.
http://www.trawlerforum.com/t34690523/the-5-most-useful-improvements-on-your-boat/[img]download.spark?ID=962293&aBID=115492[/img]