Do you have the 2 barrel or the 4 barrel version? I’m trying to find one but not sure if there is a height difference between the 2bbl or the 4bbl with the 2bbl adapter
I took measurements from the bottom flat of the intake where it would seal against the engine block China wall up to a straight edge sitting on the carb/throttle body flange of the intakes.
M1 single plane two barrel EFI intake is 7 3/8" and that is where the two barrel throttle body sits.
M1 Single plane four barrel intake is 5 3/4" and that is up to the four barrel flange of the intake itself, without a 2 barrel adapter.
Hughes Edelbrock dual plane EFI intake is about 5" up to the four barrel flange of the intake itself, without a 2 barrel adapter. The Hughes four barrel to EFI two barrel adapter is 2 1/8" tall. The Hughes intake with the Hughes 2 barrel adapter is 7 1/8" tall.
There is four barrel throttle bodies than can be installed on the four barrel intake from Holley and others. Then you just have to adapt the wiring to the sensors it has and mount your air hat right to the four barrel throttle body. I cannot find the four barrel throttle body right now to measure its height.
You could also possibly buy or fab a forward facing adapter and then mount a modern single blade throttle body and no air hat.
Or, use an older, although a little less efficient, single plane intake that is a little lower and then use any of the adapter setups mentioned above. This one would require welding in some fuel injector bungs to make it work.
Several of these scenarios have played out in my head but I have not run any of them yet.
Updated to add this note. Measurements I took were all to the front China wall area. Some intakes are angled or canted down in the front and that could slightly alter the comparisons for hood clearance.