high hump or low hump

[bigike55]

I have a 1972 chevy c-20 pickup that iam getting ready to buy carpet for on lmctruck.com . But I don't know if its a low hump or high hump wondering if someone could help me out. The lmc catalog says to measure from the top to floor board if its 4'' then its low if its 6'' then its high. I measured 4'' but it use to have a standard in it which is now not in the truck its been switched over to a automatic. the reason I ask is a buddy of mine said that all standards are high hump ones but like I said I measured 4''

Any help would be great