Which overflow should i choose

[Tstanfill]

My tank is a 46 gallon bowfront. It's drilled on each end as shown in the pics. Drilled for 1 inch bulkheads. Which overflow would work best with these holes? And where's the best place to buy if I can't diy?

 

[redfishbluefish]

Here's what I'd do....and this isn't the only option.....I'd purchase a Glass-Holes 700 gph overflow kit. This kit comes with the drill bit to drill the hole (1 1/2 inch bulkhead). I'd use those two holes for the return lines coming back from the sump......and those bulkheads can be purchased from Glass-Holes as well.