5.9MAGNUM EXH MANIFOLDS

318 "302" heads have the larger ports. I put a set on my '69 318 and the ports fit the 360 gaskets exactly. My Mopar book also states that the 302 heads come with the larger ports.

Red 273 920 heads and 302 Heads
302 and 920 Exhaust Port 3.JPG 302 and 920 Exhaust Port 4.JPG

red 273 920 heads and Magnum heads
Magnum and 920 Exhaust Port 1.JPG Magnum and 920 Exhaust Port 2.JPG