14-1 should be fine with e85. You will want to stay with the summer blend at 85% all the time.

To answer the above questions the 1/2" line will be fine from the pump to the regulator. The -6 is fine from the reg to carb. I do run -8 from reg to carb.

The pump and reg will be fine as long is it can handle 30% more fuel flow than required by your combo on gas.

I would change out the filter element to an alcohol type. I have seen it eat the glue from the filter elements.

The foam should be fine I have had mine in my aluminum cell for 3 years now with no issues.