tunnel rams

There are a few different manufactures that cast tunnel rams for hemis. Pros and cons of the different ones? Will be the standard dual quad top. I'm thinking about putting one on a 512. I am not asking about custom sheet metal units. I'm inquiring about old Edelbrock, Weiand, Offenhauser. Thanks in advance!

I always used a Weiand and by what I've seen in old P/S pics and the vintage parts are available today Weiand seems to be the perennial favorite.

Iive alwas used weiand tunnel rams,i prefer them over offy,indy makes tunnel rams too