I might be missing something, but is the pickup point really that low on a carbed w114/w115? Seems like if it would become uncovered with the inline electric pump it'd do the same thing while picking up fuel for a carb?
I'm assuming one using the stock pickup point and plumbing in an inline pump.

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K