I don't expect marvelous mileage, BUT this mileage (10) is on back roads and short bits of hiway at 60 or less. i have talked with several other folks and 10 is low...very low for this combination.

This engine and trans came from a hard drive camaro, better rear gearing and better aerodynamics, but it got 16-18.

My lift and 31" mudders are not helping..

The cam that is in there is an 'emmissions' cam, it's purpose was not HP or torque first, but low emmissions first. I can run cooler, with less backpressure, and that will make a difference on optimum breathing requirments.

if you read the original post, i will be useing a megasquirt computer - http://www.megasquirt.info/ - it has nothing in common with GM or chips or antthing like that. It just uses the GM sensors (or you can use Ford, toyota, saab, or anybodies).

Since the stock motor made a whopping 180hp, and should be capable of 250, i figured while i had it apart for the intake swap a new cam might be a good idea. I don't need 250hp at 6000 rpm, but perhaps 275 ft lbs at 2200 rpm would be good!