The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Tricked-out Chevy six cylinder engines

maydaymike · 11-03-2016, 09:52 PM

So I finally got the Offy/Holley 390 combo up and running a few weeks ago. I used a cable throttle assembly from an '88-up Chevy truck. After some carb repair and tuning, it runs pretty well, and gets around the same mileage that I was getting with the original setup, 14-15 MPG. That's with the stock 3 speed, 3.73 rear, and 28" tall tires. There is a noticeable power increase as well. I'm running it with a stock exhaust manifold for now, but Langdon headers are what I have planned for the future.

11-03-2016, 09:52 PM	#850
maydaymike Registered User Join Date: Mar 2008 Location: Jasper,AL Posts: 47	Re: Tricked-out Chevy six cylinder engines So I finally got the Offy/Holley 390 combo up and running a few weeks ago. I used a cable throttle assembly from an '88-up Chevy truck. After some carb repair and tuning, it runs pretty well, and gets around the same mileage that I was getting with the original setup, 14-15 MPG. That's with the stock 3 speed, 3.73 rear, and 28" tall tires. There is a noticeable power increase as well. I'm running it with a stock exhaust manifold for now, but Langdon headers are what I have planned for the future.