the detonation thing really isnt a biggie with me right now, because getting the ka's is like a walk in the park (cheap and easy to find). this is just going to be the starter block for now, because i will be building one up when i come back. i did the ka swap b/c someone already did the sr swap in a zx, and i really dont like the ca. as far as weight reduction, it is the iron block verson so its not to terribly much a weight loss, but having the engine so far back and so low makes it a really good choice imo. the coilovers are QA1 12" 425lb.... and trust me; it is not as stiff as it seems, it perfect for me.
oh yeah the picture of the last zx is of my very first one after i was almost finished with it a long time ago