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dswancutt · 03-24-2007, 11:59 AM

The 250 sixes with intergral heads also have tendency to crack heads. That is what happened to my 79 with a six. I never got really good gas mileage with it, but the motor was shot. I would go with the 87 5.0. I have a 78 k-10 with a 5.0 running 3.73 gears and could get 13 mpg, and that was with a wore out carb.

03-24-2007, 11:59 AM	#10
dswancutt Registered User Join Date: Jul 2003 Location: Franklin, NE Posts: 387	Re: Help- which truck indecision! The 250 sixes with intergral heads also have tendency to crack heads. That is what happened to my 79 with a six. I never got really good gas mileage with it, but the motor was shot. I would go with the 87 5.0. I have a 78 k-10 with a 5.0 running 3.73 gears and could get 13 mpg, and that was with a wore out carb.