Here’s reference to square port W-2’s. From other paperwork they were having foundry issues with them and that might have killed them being available to public. Not sure if any survived to actually race.
I cant find my other reference to W-2-1/2 and W-3. Not sure if this “square port W-2” is also called a W-2 1/2.
View attachment 1715768922
View attachment 1715768923
