personally--if I was going to have a back up fuel pump---
It would not be that one--I would have a extra Carter pump===it would only take a couple minutes to replace it if it dies---the pump you are showing for back up---I have found to be NO good---just my experiance with them.
Also--I would set the floats a bit low to be ready for ruff conditions out in the waters. Edelbrocks can flood out in a rear or forward condition of force--like crossing bars that are rough.
Personally I like Quadrajets--Just my .02
