Could I run this with 24lb oring injectors or would I need better also I'm already at 400whp would this turbo be too much for the block and what other support mods would I need also looking at the cxr racing twin set up any thoughts about which to go with
If you are already at 400rwhp on the stock block, then your will definitely be exceeding the capability of the block with the addition of this kit. 24lb injectors would be way too small for your current power along with the addition of boost. 47lb would be more appropriate.
I cannot speak to a comparison of the cxr kit as I have no experience with it.