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Re: 72 Gmc k15 Lift adivice
The real issue is fuel economy on the highway. My experience with big tires and no gear was crappy mileage because you were below the efficient operating range of the carbureted motor setup. I would start saving for a gear swap. 3.73 with 33" tires or 4.10 with 35's. My 4.10's are the perfect gear for the 35" BFG AT's on my truck.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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