K10 "72 Cab Mount Height HELP?????

[72okme2u]

i have 72 k10 i need to know the measurement difference between the front and rear cab mounts PLEASE. All the chassis pics ive seen are for c10,s or print is to small i cant read. My truck is sitting on a 73 and up frame (screwed up when i bought) now i am trying to get it right. I only have front mounts holding cab
If anybody got one sitting on good surface and could measure from ground, just to give me an idea.
Please thanks