Conversation Between 75F350 and 1976 Frankenstein

i got a 76 f250 highboy. its got a jacked up lift on it in the rear. its got like a 7 leaf pack and then its got 5 more little leafs and then a 4 inch block. i flex like a ceder fence post. i saw you talking about chevy springs, but you said 64" and 52" i just want you to clarify what length i actually need. plus im doing a skys offroad design shackle flip