I plan on building a longtail in my shop but I need some ideas/opinions on what would be best for a shaft diameter and shaft housing for that diameter. I plan on running a predator 420 cc motor on a 14'-16' jon. new to the mud motor thing so any sort of info will help!

Not trying to be a dick, but use the search feature... There is a wealth of information on this site but you gotta put a little time in to get what you're looking for... starting a new topic with a question is generally useful if you have already scoured the site for a similar problem and have come up with nothing...

Hmmmm...... It blocked out the company i ordered it from. The company is B.a.c.k.w.a.t.e.r. i.n.c.

Thanks Greg that's what iI needed