Bummer ACAM37...

Once you get it back up and running you may find it will run perfectly with your setup as is...

Your tank doesn't look too aweful low (compared to for instance the GP CAP 232 stock location).
It's likely the bearings and other aspects of the engine were causing it to overheat... that alone may have been causing the issue, OR is was losing pressure at the high temps.

Mu suggestion after the engine is in flying order again is to put it back in as setup now... without cowl and fly it. This will give you quick and easy access to test temps and access needels until you have it where you want... OR the ability to add a pump if you end up needing to do so.

Sorry 'bout the luck... when you get her in the air she'll probably be a sweetie...

BTW... WHAT Bipoe airframe is that you're flying the 1.60 in? A recovered DP?