72 duster resto

You've git the old-school MP purple shaft cam designed to run from 2600-6000 rpm and an Airgap RPM manifold designed for the same range. Get the compression in the 9.5+ range with the iron heads and, with that cam, you should be fine on 87 pump fuel all day. With your manual brakes, that cam will be fine (no worries about vacuum/power brakes).

I ran a 383 with that cam "back in the day" with iron heads and 9.7 CR. Ran on 87 octane just fine and that was a bigger bore/shorter stroke engine (BBM). And we know "stroke eats duration" and the 360 has more stroke. Also ran a 750 vacuum Holley. It was a good-running engine that pushed my 4200+# 69 Charger to 13.0's with a 3200 stall converter. Drove that car all over as well as to the track. You're not going to the track but my point is you'll have a nice-sounding engine that is plenty tame for the street and fun to drive.