It's possible to tap exhaust gas off the Fentons and circulate it under the intake with a heat transfer block bolted to the underside of the stock intake. That's much better than using coolant- - - -which is COLD at precisely the time it needs to be several hundred degrees. It's still not as efficient as the original equipment setup, but it's better than nothing. Send me a PM if you like and I'll get more specific about how to do the heat transfer setup.

Running Fentons and dual exhausts is a very good example of why doing race stuff on a street engine is stupid squared!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!