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Old 11-08-2010, 06:42 PM   #8
INSIDIOUS '86
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Join Date: Jul 2009
Location: washington
Posts: 4,178
Re: Improve mileage 350 with Quadrajet

All of the above is great advice and I'm not quite sure if your on a budget or not but the cast iron intake and exhaust manifolds really kill the efficiency of any motor look in craigslist and see if you can find some headers tri y headers would probably be best cause they promote low end torque like no tomorrow and torque is what moves yours for the intake have it replaced with an aluminum intake that helps breath and mix the fuel a little better and if possible replace the rotchester carb with a Holley or edelbrock carb also on the pics it looks like your timing is off or such cause it looks like the vacuum canister is way towered the firewall so it's probly off quite a few degrees also make sure that the mechanical advance isn't sticking and replace one of the springs at least with a lighter spring to bring the timing curve in quicker any body see any faultsnin that plan? I don't usually build for gas mileage bit I know that a more efficient engine makes more power with less gas
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