OK ... here's a thought.

The tanks will drain equally when each one is hooked up to it's own motor.

Maybe the v20's founding fathers, in their infinite wisdom, came up with the saddle tank setup because the v20 was expected to be run with twin outboards, anyway.

I remember the OMC 135 was the beast, until mercury introduced the 150 in '74 or '75.

After all, the v20 was rated for what -- 275?? -- back then.