Thanks for your opinion, Alfred. If doing what you suggest wasn't such a big distraction to getting the car back on the road before snow flies here, I would do it.
I decided to try one more time to find the way the C107 cover was installed so I imagined a Type 4 w113 cover being "simulated" with the C107 cover. It meant using the diagonally opposite two of the three mounting holes instead of following my engineer's instinct to line things up perpendicular and parallel. Installing the C107 cover diagonally was really quite easy once I rotated the angle of the outlet fitting just a few degrees.
Later, when it's on the road and I get the urge to "fix" something, I'll try to get back to doing it in a more "perfectionist" manner, at least using a Pagoda cover. Right now I'm in my "masochism avoidance" work mode.
By the way, in the first post photo of the rusty mounting bracket, the single rubber isolator attachment leg toward the front of the car is also made by the manufacturer of the Type 4 pump cover. Its photo is in the link that you sent me in your last post.
Here's how it looks now and how it looked when I bought it in 1987, except it's a lot cleaner and newer looking.
Tom Kizer
Levis, Quebec, Canada