I would beg to differ.. don't care if its a vendor or not ... 301 pump on E85 has been mid 10's on ALOT of cars.. on 80's ... I personally setup at least half dozen and they run mid 10's no issues.
Some vendors will put you into parts that they think you need.. I can tell you for sure .. a 301 will support mid 10's on E85 and be safe ...
The Walbro is a bigger pump.. so I don't see low 10's hi 9's as an issue...
If you really want to turn things up to block breaking levels ... use a twin intank pump ... run 9's all day on 2 301's
What does the 301 pump flow (is it 301 LPH) and at what voltage . Is that through the stock lines? Do you usea volt booster?
Thanks