Electric water pump - configuration of heater hoses

Running a SBM 408 stroker. Street/strip car but currently basically only strip as it has the "electric water pump drive" which as you all know is not very streetable at all (if you didn't know that, the Moroso water pump drive does not flow enough to sustain steady state use for extended time.) After winning the final round Saturday, driving down the return road, the engine temp gauge began to climb and the already troublesome electric motor had fully given up the ghost. Fortunately not any sooner else I'd have had to forfeit.

Trying to rectify this and make the car street-able once again for next year, therefore I have 2 questions regarding all of the electric water pumps out there. Basically sounds like there are 3 "bolt on" options for small blocks? CSR, Moroso, and Meziere, is this correct?

1) I need to retain the heater core. What do I need to make this work, as the stock water pump has the heater core hose fitting?

2) It seems there are some questions out there about belt routing with the "expensive" electric water pumps. Currently the alternator is in the stock location and I am just running a single belt from the crank to the alternator. I don't see why this wouldn't work but sounds like a lot of people going to the lower mount alternator? Is there a clearance issue I am not foreseeing?
I'm just a little confused as are you asking because you're going to put a full electrical water pump on or are you just going to put a manual pump and triangulate the belt? I have had the little belt drive that drives the manual pump and I've had the full electric water pump.