The Dayton blower you are referring to is what I've always called a "squirrel cage" fan. The air is pulled into the larger diameter opening, and is exhausted out the smaller (the square part on the end).
The blower you decide upon will be predicated on the size of your booth. For example, if you have a 2' X 2' booth (2 X 2 = 4 square feet) and considering you should be maintaining about 80-100 feet per minute (fpm) at the booth face then the minimum cfm required should be 4 sq. ft. X 80 = 320 cfm. Adding in filters, length of exhaust ducting, numbers of right angles in the ducting, etc. (all these add resistance and duct transport velocity fall-off), you may want to add an additional "fudge factor" of about 10-25%. Mounting would probably be better at the back of the booth. Airflow should be as linear as possible. Hope this helps you some.
By the way, welcome to the forum family!
Gip Winecoff