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Re: Engine mods on an 86 4x4 for towing a 3000lb. travel trailer???
What size tires? If it's around the 235/85r16 that the heavier duty trucks came with, 3.73's will definitely warrant 3rd in the 700r.
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Alex V.
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1967 C10 Suburban, 350/NP435, Green/Green, PS, PB, HD cooling, charging, shocks, and springs.
1985 GMC C3500 SRW, Sierra Classic, 454/TH400, white/blue.
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