I have a set of nearly new, Eaton 175# springs arched 1†over stock. I put on my ‘68 for a summer but then decided to lower the car and switched to Hotchkiss dropped springs. These are heavy rate multi leaf springs. PM me your email and I’ll forward the receipt. Then research with Eaton to see if these are what you’re looking for. If they fit the bill will make you a righteous deal!