Roger he has hairpins, I think you are talking about 4 links--
In suspension issues(other than what it looks like) should be referanced to the ground(mother earth)
If the links are parallel to the groung it doesn't matter what the frame looks like--If you look at the 32 ford pics in my gallery of the header build pics you can see where the block/top of frame is--keep in mind that that is a mock up block and there is no oil pan on it so its easy to see the height of engine(crank centerline) to the frame rails, which are basicly parallel to ground---and yes that one is a ifs , non an I beam axle but engine height to frame is what I'm referring to---

This subject car WILL have frame and suspension pieces bottoming out on ground as its laid out