i measured a f150 harley truck by my 01 supercrew before i droped it it wasnt much lower than mine stock. like an inch or so the front looked way lower because of the bumper they had on it.
heres a pic of mine. i did the hangers and shackles and 3 inch springs with some heat wrench touch up.they didnt drop it much at all so i helped it. i also added helper bags to it for pulling since it was just the towpig.