which tri power manifold for a 292 y block for better flow

I am looking to purchase a tri power intake for my y block. I jusr wanted to know which one flows better?

 

Edelbrock FM573 Supposed to be best flowing.
Got one on my 56 with Vintage carbs and it runs great.
http://m571.com/yblock/intake.htm

 

I would have to agree. Mine ran tip top.

 

Yeah thats what I heard. Also heard that offy and fentons eerent the greatest because the ports were small?

 

Go to the Y Blocks Forever site, some dyno run info can be found if you search.