Thank you all here's the response I got from Classic Auto Air:
For the Mirada, we can put together a custom kit based on the information you supply.
We offer two fully electronic Flex-Fit kits that include the Street Rod Cooler III (SRCIII) and the Custom Colder Elite (1-1090). The third universal unit is the SRCII. It is a cable operated unit.
The difference in the evap units is the size. The SRCII and SRC III are 20-1/2" in length, 9-1/2" in height, and 7-1/8" in width. The Elite is 24-5/8" in length, 10-1/2" in height, and 8-3/4" in width. I would recommend fabricating a cardboard box with the dimensions listed and check for clearance issues.
On all your options of evap units, the coil connections will face the passenger side kick panel. The hoses can be ran out through the kick panel. This will conceal the hoses.
Once you determine which evap unit will best fit, you will need measure the radiator opening for the largest condenser that will fit. You will also have your choice of four louvers you would like to use, a choice of two defrost ducts. You will also need to look at the current control panel and see if it can be modified to accept the cable integrators.
Since the kit is custom, ordering the kit sounds pretty daunting. If you take your time and order the best fitting components, it will make the installation less of a headache