Flow is very similar.
325 has a little larger area.......if you build something that can take advantage of that, it should be able to exploit that.
TF’s are less money and don’t need offset rockers.
If the TF heads are in stock then they would be the lower cost, lower hassle choice. You can use a standard rocker arm setup so you save more money there. You can also oil the rocker arms internally with the TF heads. The TF270 heads are good for 700+ hp right out of the box. With a really good intake manifold and the right cam you can make close to 800 hp with the TF270 heads. The Indy big EZ heads will make more power on a race engine but you'll need to spend more money. The 572 that we just ran on the dyno made 860 hp with the big EZ heads so they can make power.
