I like your Blazer .It's no surprise mostly Chevies showed up ~ in the 1970's we had terrible rainstorms and I roll up in my unrestored but ever faithful 1946 3100 pickup, vacuum wipers slapping away, heater gently blowing hot air
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I recall one epic tow job from Lake Tahoe to Los Angeles in a snow storm ~ 6.50 X 16" bias ply tires I thought I was going to freeze to death but the rig never skipped a beat .