Quote:

The ONLY thing that I see getting some abuse from it is the holley main bodys that must be made of smelted Chinese beer cans.

I am only guessing, but my 2-cents:
1) The Holley anodizing on the main body isn't protecting.
2) The aluminum may have a bunch of zinc in it for easy casting.

Zinc is very prone to corrosion, and maybe it does the same when alloyed into the casting aluminum.
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I am using an Aeromotive pump, rated for methanol and gasoline, so I can't help there. I was running a Barry Grant regulator, rated for gasoline only, and the elastomer seat deteriorated on E85. I don't know if it just gave out due to old age (7 yrs), or if it was the E85. Now I run a RobbMc regulator rated for alcohol and gasoline. My Fram HPG-1 filter is holding up just fine after 1-year on E85 (7 on gas before that).