The front mounted tank has not caused any heating problems from the blocking air from the radiator. In fact I have blocked off the grille too - with no problems. Water temp of 170 to 180 when I get back to the pits.I was wondering where a person would mount a fuel tank. I guess with your system air flow through the radiator would not be a problem. I have heard some say it is harder to make heat than get rid of it.
Maybe by next year we can make some changes. Now if it would only look as good as what you have.