Raising Rear End with a Lift Block kit on my Slant six

Ols school spring shackles out back. Probably cost 7 bucks at Pep Boys. I had my high school 340 65 Barracuda rear so high, 14X10 rims cleared the rear fenders with Gabriel hi-jacker air shocks! Probably about 4 inches higher. Blocks will lower as the spring is already on the bottom.