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74 shortbed 406 · 03-24-2007, 11:37 AM

In my experience the six will drink just as much as a 350. I had a 74 with 350 turbo and 3.73 rear gears. The six got 10-13 depending on how hard you pushed it and the 350(stock rebuild) got 13-14 and it was more consistent on mileage. As for the 87, I have one now with tbi 350, 4x4, 465 tranny, and 3.08 gears and it is at 14-15.

03-24-2007, 11:37 AM	#9
74 shortbed 406 Registered User Join Date: May 2005 Location: Bowling Green, Mo Posts: 204	Re: Help- which truck indecision! In my experience the six will drink just as much as a 350. I had a 74 with 350 turbo and 3.73 rear gears. The six got 10-13 depending on how hard you pushed it and the 350(stock rebuild) got 13-14 and it was more consistent on mileage. As for the 87, I have one now with tbi 350, 4x4, 465 tranny, and 3.08 gears and it is at 14-15. __________________ 1978 GMC K25 2002 Dodge Dakota R/T rc swb In need of some more goodies.