Welcome to the Forum!
Everything you said makes sense, but let me add a little:
Depending on how long you ran hot and dry, your water pump impeller is suspect at best.
No priming bulbs, please. At least not for permanent installation. They are not rated/safe for interior machinery spaces.
A fuel pressure gauge is invaluable for troubleshooting. $15 or so at YLFAPS (your local friendly auto parts store).
Do you have an OPSS in the fuel pump circuit?
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Jeff
S/V Bunny Planet
1971 Bristol 29 #169
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