My Frigiking installation manual -- a copy is also in our Tech Manual: see photos on its pages 10 & 11 -- originally came with templates that would be hugely helpful in locating and mounting the underdash evaporator (and fans, switches, air vents, etc.) assembly. One template is for overall placement in the passenger footwell area and the other is a 'blueprint' for the main hanger bracket.
These are for practical use in my A/C project, not a literature collection, so I'm open to any method(s) of transferring the information that works for you, will contribute whatever is helpful on this end.
Thanks,
Denny