I have not read everything, so pardon if I repeat or miss something.
I have a 91 bluebird all American.
From the front wheels forward, Everything is lower than everything behind them.
If I approach a ramp with a 16” height, 6’ from where my front wheels touch it, I will scrape.
I built 15” service ramps, one side scrapes a little.
If I back up the ramps, there is no problem.
My bus is leaf sprung. If I want an extra inch or two, I can add air springs. Not for always, but just when I need a little extra ground clearance.
Maybe that will help.
I have a 91 bluebird all American.
From the front wheels forward, Everything is lower than everything behind them.
If I approach a ramp with a 16” height, 6’ from where my front wheels touch it, I will scrape.
I built 15” service ramps, one side scrapes a little.
If I back up the ramps, there is no problem.
My bus is leaf sprung. If I want an extra inch or two, I can add air springs. Not for always, but just when I need a little extra ground clearance.
Maybe that will help.
.


