Definately a bit high...........chassis should be approx 140mm from ground if i recall correctly, which makes 5 and 5/8" in old money and about 3 and 1/2" to the exhaust downpipes as they pass under the chassis - ish. This is all memory though as once again PH search is dead.
This is what the right spacing should look like, as said above 150mm to chassis rails from floor.... obviously not all bodies/bonnets fit perfectly so some may look a tad odd.