Your not getting the answers you want because your posting several questions about many things in the wrong forums. I'll see if I can help you anyway.
1. Motorsport Auto, Arizona Z, Good luck
2. In a Z yes. I've never seen one in a ZX but, that doesn't mean it hasn't been done. I'm sure it could.
Don't over look the Turbo L28et it can be made to be very relieble at high HP levels with the right engine management systems. Don't worry about the weight. Make the power and it won't matter.