> As installed, are the radiator end tanks on left and right, or
> top and bottom?
the tanks are forward and aft. The forward one is about 4 inches higher than
the aft one.

> And is your return line on the bottom, or top?  Consider how air
> will escape, if it ever gets into the radiator.
The lower expansion tank connection is plumbed to the forward rad end tank.
The upper expansion tank connection is plumbed to the top of the engine
block.

It seems to work.
Should it? :)

John