Re: 1969 Starcraft Chieftain Restoration
Mine came with these (believe it or not) old barstools. They spin 360 but don't move fore/aft so I bought one of these to experiment with:
http://www.boatdepot.com/productdetails.aspx?part=20-1011
(I hinged the cabin door so it would pass the passenger seat easily..was a pain originally.

)
Bruce, you're a big guy so this shouldn't be an issue for you but the stock footrest isn't tall enough for me (5'11") when sitting so I use a small foldable foot stool so my feet don't dangle...tackle boxes work too.

When mooring or hauling arse somewhere I prefer to stand so being able to move the seat back should make standing behind the wheel easier/comfortable.
My boys have gunboats for feet so when they're along footroom becomes an issue. The cabin becomes gear storage headquarters on those trips.