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Old 08-02-2015, 01:32 PM   #19
BK4020
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Join Date: Jun 2015
Location: Brandon, SD
Posts: 12
Re: 84 GMC straight 6 repower

Quote:
Originally Posted by burnin oil View Post
I missed the axle conversation but a little note about the Dodge D80. It is actually only a D80 pumpkin with D70 outers. If you look at the axle tubes you can see where they neck down at the ends. They also use the same axle shafts as the 70. Still it is one tough axle. The 3.55 gears work really well for all but the heaviest towing so I wouldn't worry there. My dads 2500 has the 4.10s and tends to pull in a little better milage empty or towing. That's not a fair comparison as mine is a 12v standard cab and his is a 24v ext cab short box. Both 4x4s with manual transmissions. If I was building the truck for some decent towing and not a lot of 70mph driving it would be 4.10s.
Yeah I'd like to be able to put it down at 75 and cruise down the interstate at a decent rpm. We also have a 32 ft. gooseneck trailer for hauling random stuff around, loaded down it can really make my dads 04 duramax work. It would be nice to be able to lug that around so I don't know if that's asking to much out of this pickup, being a shorter wheel base and single rear wheel. I'll have to see I guess.
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84 gmc 1500
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