The block itself isn't the problem. Any of the modular blocks will probably handle over 600-700RWHP. Some of the earlier Teksid Aluminum blocks will handle upwards of 1000hp with propler prep. It's the internals of the modular engine that's the weak link.
Yea the 03/04 cobra block is actually further strengthened vs the other modular iron V8 blocks....the block has been proven to handle well over 1000RWHP. In other words....you would have a REALLY hard time cracking the block from sheer power and cylinder pressure.
^ i wish i had a termi. o well im gonna push this lil 2v and see what they can really handle since nobody has a set HP level. cody pushed his pretty hard on stock internals so im going to see what they have.
11psi pulley just came in today so ill start off with that then maybe get a 14psi pulley and see how it likes that then if it lets go o well mmr 900 shortbloc here i come
sorry for hijacking the thread. but yea everyone is right forged internals and nice high flow heads.