The RPM will clear the hood on A bodies and the use of a drop plate air cleaner, like from Mancini Racing, will allow its use. I’m suggest you select an air cleaner but that is short and flat to clear the under hood insulation if you have it.
For what it's worth I run a Hughes RPM AG with a 1/2" spacer, Edelbrock AFB and a '72 trap door air cleaner with no clearance issues. No insulation though.