Interesting video RPM Airgap intake flow.

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.
the 62 has a pretty low hood line.. it's just one thing to figure out when i get to it.. i already have the rpm ready so.. no biggy at this point..