I'm 68, and I've had Chevies since my 1st car, a 1966 Chevy Nova coupe. A floor jack and a foot-long piece of 4 x 4 won't fix it, but it will buy you some time! Whatever "adjustment" is required, take it slow, nice and easy. To this day, I "adjust" the doors on my '74 C20 this way. It won't...