Re: 67 Suburban Diesle Conversion Ideas
1/2 or 3/4 suburban? an honest 25mpg is pushing it, with any fullsize truck.
4/6bt would be my go to. The 6.2/6.5 might be easier swap wise, but I personally hate 'em. Unless you can get a 6.2/6.5 DIRT cheap its not worth the hassle.
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