Too much intake? RPM Air Gap on a stocker 360
air gap is the same height as a performer RPM, and cleared my 5th ave hood fine with no spacer and a dual snorkel air cleaner out of a cordoba.
it's a roller cam 360? send that cam down to Bullet Cams and have them regrind it and reuse the roller lifters!!! get some hughes #1110 springs, and I'd probably go with the HR260/340 lobe on the intake, HR268/340 on the exhaust on the stock lobe center, installed about 4 degrees advance. should make for a VERY stout motor.
Bullet Cams Master List
and yeah, if you plan on keeping the AC in a early 80's up vehicle with the rotary A/C compressor, you'll have to come up with some adapters or new mounts to relocate the compressor a bit. did that on my 5th ave 20 years ago.
https://www.autoblog.com/news/rr-of-the-day-unholy-cool-1986-chrysler-5th-avenue