Clearance between header and ground ???? 1971 A Body

Ok. Thanks for the clearance measurement. Keep in mind Im not a builder and my terminology may be incorrect.But here are the specs on the garage. Built indoors by the Amish in Fremont MI by Mast Mini Barns. 14' wide 36' long. Studs and rafters 16" apart. My township is strict. Thickened Slab is 18" thick along the 8" outer perimeter. 6" sticks out of the ground and 12" in the ground at the outer perimeter.. The center of this slab is 6" thick. I had steel bars and mesh positioned thru out. 4"x4"s run the length of the building. To meet code I had to install (I chose) Simpson Strong Ties. Special concrete bolts. I bolted the outer most 4x4s to the concrete with 8" Simpson bolts. Each bolt penetrated 4.75" into the slab with placement being: A bolt 12" from either building end and then every 6' thereafter. Siding and roofing had to match my house. Ridge vent runs entire length of roof. Header above the gable end Trac Rite 9x7 roll up door consists of three 2"x10s". I was told by the inspector to install bracket supports on each rafter. To my surprise the builders installed Fasten Master Timberlock rafter ties. These are 6" bolts that with their install tool ties the stud, the top plates and the rafters together. These bolts met code and I was not required to install the metal brackets. I had 2 windows installed and an extra large entry door. Total for the building- delivered and set on my slab was $11,300. Buick and any car for that matter has not been in building. I cannot build my ramp yet. (I plan on using pressure treated lumber and store bought concrete blocks in the ground). I herniated 2 discs in my Lower back 3 weeks after the garage was delivered so I am out of the fight awaiting spinal surgery. I have installed critter wire to close off the underneath to critters. I had 2 estimates from 2 builders for a site built garage and both estimates exceeded $20,000. Plus they are very busy and other people who hired to have a garage built were upset with the delays. So due to my injury the ramp and electrical will be next year when the weather becomes nice enough. In the mean time I have run a cord out there and set up table and chairs. I stream podcast from my phone thru a nice stereo and relax with a coffee honey and whiskey mixture.