There are 4 different cylinder heads for FEs if I remember right. Lo Riser, Medium Riser, Hi Riser, and Tunnel Port. Tunnel Ports were rare and well named.
WAY more than that. More like about 20 or so different castings. It's ridiculous. What you're leaving out is the truck stuff. WAY different heads and there are several castings of those as well. They are kinda like the 440 truck and industrial stuff. Completely different intake and exhaust patterns but still FE. It's craziness times a million.
