bought this to fix fuel drain back problem

I will weigh in. I have bought your do-dad off Ebay, and am waiting for it to show up so I can install it inline on a Slant Six. Thanks for the tip. I have been having all the same problems you have mentioned on not one but two of these beasts: one an Edlebrock fed 318 with new everything from the fuel pump to the carb, original parts back from there. . . soon to be new everything from the tank forward. . . and one that IS new everything from the thank forward to a Ball and Ball single with SlantSix Dan's mods done, feeding said Slanty. Both cars would appear to lose prime after about a week's sitting, by whatever voodoo, and need excessive cranking to get the fuel filters and bowls full enough to start. And yes, it seemed to begin about the same time as E10 showed up as my only choice for gas. Most of my ideas as to why have appeared here already, so no need to rehash. I was getting ready to build a priming pump set up when this thread appeared. . .and, I too will let ya know if it is effective for me as well. Thanks again.