The W2 and W5 share a few parts, but a W5 is nowhere close to a square port W5. I own both. Exhaust ports and exhaust bolt patterns are different, intake port floor is raised and ports are rectangle. Very different heads that share a few parts.
That being said if OP has a ported set of...
There are plenty of 400+ cubic inch small block mopars that will never hit a track and could use a head like this. Look at all the big port small block chevy heads sold, they surely arent being used at the track only. Lots of folks are happy to run a factory block 600+ hp, especially in a...