1969 GT500, A/T, with A/C. I need a vacuum line routing diagram for under dash and the engine compartment. Can anyone help me out with this. Thank you.
Likely the best guide would be a scan or copy the 69 Mustang Electrical and Vacuum Manual. Its an over size (thank goodness) manual so not easy to scan - maybe a picture instead. These will show illustrations of the hoses and connects while diagrams (see below) will show routing but not the details
Below is the generic vacuum diagram for a 69 428 CJ with AC and auto. Blue line is there for other Ford model applications so crossed it out. Again this does nto show things like valves, vacuum cans, clips and details but it is what you requested :) Borrowed from the Ford 69 Emission Manual back pages
(http://www.concoursmustang.com/forum/gallery/15/6-210121161921.jpeg)