4" at front of oil pan is the low point. More clearance as you move back.How much pan clearance do you have?
The leaf spring can factor in too. I removed the smallest leaf from a new one to soften the ride and lower the front a bit. There are monoleafs and even composite monoleafs that would have different ride heights. There's a firm, VBP, that makes the composites for Corvettes and they said they would make one to my specs. For a princely sum, I assumeAs you know your spring perch height will establish the front frame height,