Okay so I've done a lot of research and I've narrowed it down to sending my 243's off to get ported by TEA or just buying TFS 220 as cast. I already have Yella Terra roller rockers so I wouldn't run into that issue with the TFS.

This will be going on a max effort LS6 supercharged setup. The car will be staying stock cubes, final horsepower goals will be 1000 to the wheels.

I know the TEA will probably flow better but I'm wondering if the improved valve angle and deck height of the TFS will be worth it.

Has anyone actually broken anything on a 243 with boost or is that just another internet myth?

 

For 1000rwhp to the wheels I would want the aftermarket deck, others will say different, just personal opinion.

 

I would rather spend money on a aftermarket head as you can always upgrade them or sell them easier later on.

 

Dont worry about the flow number difference. Get the aftermarket casting for the deck thickness and head gasket retention. It matters more than 20 cfm does.