The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

shifty · 03-17-2005, 12:32 PM

Thanks a ton for posting this thread. I wanted to see a similar thread, just didn't want to be the guy who started it

I've got a 68 step SWB w/L6 250 with a 1bbl carb and 3 on the tree. I get ~15-16MPG on the highway from what I can tell (65-70MPH). Not sure about city miles. The truck has plenty of 'pep', but I want to put something bigger in it. Not thinking as big as an LS1 or LT1 - more like the 4.8L V8 vortec engine that was in my '03 Sierra. I got 19-21 MPG highway with aftermarket intake and one of those hypertech programmer things.

03-17-2005, 12:32 PM	#12
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Thanks a ton for posting this thread. I wanted to see a similar thread, just didn't want to be the guy who started it I've got a 68 step SWB w/L6 250 with a 1bbl carb and 3 on the tree. I get ~15-16MPG on the highway from what I can tell (65-70MPH). Not sure about city miles. The truck has plenty of 'pep', but I want to put something bigger in it. Not thinking as big as an LS1 or LT1 - more like the 4.8L V8 vortec engine that was in my '03 Sierra. I got 19-21 MPG highway with aftermarket intake and one of those hypertech programmer things. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.