Bouchillon Performance makes all the bracketry for the engine, the rep from Classic Auto Air told me as much. 3/4 wasn't so bad with the basically race manifold with EFI that I have here.
I do have quite a lot of time in it already, probably 14-16 hrs including removing all the old parts and re-sealing the timing cover. It's a really big project, don't kid yourself. I think with a later car it might be worse given that the heater controls are probably slightly different and also the core supports are different so you may be making even more modifications.
I am planning on getting a new bezel designed and 3D printed so that the heater controls are correct on the face.
-The fan now has 3 speeds/4 positions instead of 2 speeds / 3 positions
-The mode selector -> OFF is now "DASH" or A/C, HEAT is now Defrost, and DEFROST is now floor / Heat. You can blend between any two of the settings.
-The temperature selector is still correct.
The compressor will be on if the fan switch is in the on position and any position other than heat / furthest right is connected.
It might be some time before I get this finished due to wanting to have a new bezel and it being cold. For sure it will not be charged this year though I may rent a vaccum pump to check for leaks.