I gotta big boat... I'll need two!

I want to run one aeromotive pump. I love the pump, love the design, and love the customer service. They stand behind their pumps and rebuilt a pump for free for a friend of mine 3 years after they sold it to him, and it was HIS fault it busted (he didn't run the filter before the pump). That said, I feel like I should always get home on two pumps, but I definitely don't want to be rebuilding those things once a weekend.

I guess I could go with the mallory pumps, but they don't seem that much different?

I didn't plan on changing the ignition system, unless I do the mallory ignitionless distributor system. The MSD reference was only relating to my car. (which never failed on me, but I have heard horror stories about their marine ignitions) The factory stuff seems good enough for now, at least for what I'm doing. I'll probably upgrade the wires and coil this spring, but other than that everything seems fine on the ignition end.

I ran a 110 mallory on 550hp SC motors and had good luck. If you do the math, 110 is about 2x the capacity needed for each motor, and no return line needed.
I've worked on a boat with aeromotives and 700 SC motors that's burned pistons a couple times. It had returns plumbed to the fuel level sender. They move A LOT of fuel and I'm beginning to wonder if they're outstripping the capacity of the pickup or anti-siphon valve.
Either way, mount electrics as close to the tank and as low as possible, use a filter, oil pressure safety switch, and remember the block mounted fuel water separator is not rated for pressurized fuel.

I run a Mallory pump also for the last 6 yrs. w/o a bypass. If I was to install a b/p i would use the vented hose from the tank. Use a "Y" fitting on the cut vent hose and connect your b/p hose. Simple and easy.
Had nothing but problems w/ holley pumps.