Bobby, Not sure what the answer is to your two questions. I run VP Leaded race fuel and have a 2 step as I'm sure many others do.
The Accel dealer/installer I talked to is Lee At Hesco. # is 205-251- 1472 and his E-mail is
LEE@HESCO.US
I have found that Accel has no tech service to speak of unless you contact one of these dealers.
John