I'd bet many engine internals are the same also. Check timing chain and gears (I had a 1990 3.9 that had a factory double roller chain and gears in it), pistons, rods, lifters, push rods, rocker arms, valve springs, valves... probably all the same as 318 parts.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph