Sorry Matt the pump I had is sold. Anyways Here is my advise. Go with a Mag 9.5 return pump. It has a 3/4" return fitting, pumps 950 GPH and from what I have heard they are bulletproof. The inlet/outlet plate is easily replaceable (would have fixed your problem) as well as the impeller. I am running a Mag 12 return on my 120G and a mag 7 on my Ev-180 skimmer. Both are working excellent and are very quiet. I wouldn't go smaller than the 9.5 as you can always divert flow back into the sump if wanted but if your pump is underpowered your stuck. The mag pumps can be run submersible or inline also. Hope this helps.
http://www.jlaquatics.com/phpstore/s...ct_ID=wp-mag09