Mine is under the dash. I fabricated a bracket that picket up the stud the heater box brace mounts to. The other edge mounts to lower edge of the dash frame. Wires run out the hole for the air grabber cable. I am running a 6 bbl hood.

68 Road Runner (383/4speed, post car w/decor pkg) - Major Project
69 Road Runner w/472 Hemi & 4 speed.
70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project
2023 Ford Mach 1