I have a stock 250 inline 6 and would like more performance is a shift kit the way to go???

When I first started my Mav project, I planned to reinstall the C-4 and bought a B&M shift kit from Summit (part no. BMM-50262) to go in it. I have since decided to convert to a 5 speed, so the shift kit is for sale...brand new, never been used. I'll let it go for 20 bucks and buyer pays shipping. E-mail me if you're interested.