The "guy" is right, some T-5s have the bellhousing cast along with the gear box, tell him you want the other style. The one you want will bolt up nearly the same as your old trans did, with some minor differences. Check this site for tech tips on the T-5, also go to
www.Inliners.org site for more T-5 info. But, hang in there you'll love the T-5 when it's installed in your truck. best of luck.