Here is what I have.
One image from the 69 Assembly manual
One imagine from parts catalog for 1970 AC mounting.
Lower mount was changed from 68, no longer connects to cylinder head bolts. Upper mount to intake has changed. Front mount (big aluminum piece) looks the same, but I can't be sure.
Page 452 of the Restoration Guide has a good picture of the 69 compressor mounting ... but again, no 68.
Since there is no 68 Assembly manual, you (we) might have to find someone with an older parts book (other than the commonly available 65-75 version) that shows a illustration of the 68 compressor mounting. I could use this info also as I have yet to install the AC components.
I can email you either one of these imagines in a larger format, not sure how to post the larger version here. However they don't really offer any more helpful info than is found on page 452 of the Restoration Guide.