Not to be a wiseguy but how many bolters on this board drive in these conditions....."I live at 4300 feet about sea level and will occasionally climb a 6% grade to elevations of 8600-9000 feet above sea level." Your headers are the wisest bang for the buck as the exhaust gases are expelled more freely, read: less restriction yielding more horsepower.
I've been running a H-W for 7 years now on a half ton daily driver with overdrive and Fenton headers. Works like a charm, fuel mileage as high as 21 mpg highway. I hope carb people or big truck people chime in to give you perspective, if they don't go ahead and email them direct. We all want you to succeed. Regards, Cosmo.
~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer
| 
