Hi I am making the modification to the KB manifolds. I would need your and 4 weeks to complete the fabrication and welding. As far as the intercooler pipe goes that has to be fitted while on the car and would be best left to you. I can help with choosing the pipe angles.I know this post is old, but are you still offering this?
Here is an example of the manifolds with a compact bypass provision that I have designed. I offer this for $1000.