What Engine are you using it on ? I'm looking at a 77 Dodge Sportsman Motorhome and the one thing that scares me is MPG.
With a 440 I think it will get near 12 MPG. Or even 10 MPG
Now with a 360 I think it would get somewhere around 12-14 MPG, I would like to have at least 15 MPG .
I'm looking at the site and see some wild claims. So since we both are fans of Motorhomes and all

Can ya tell me how true this all is ?
Joe