I guess if you can't find a spare engine to drop in, this is certainly an alternative. Seems like a tonne of work to get near the same amount of stock RS motor, but on the other hand it does over some benefits over the ZF tranny for sure. Have always loved the sound of a lumpy engine with lots of overlap on cams. Reminds me of the days as a young kid hot rodding cars and dropping different engine combinations into various rides. Sometime back I wanted to put the 4.2TT RS motor in to an NSX chassis. It proved to be too much work for the end result and ended up instead just going FI on the 3.0 Honda engine which works just fine. Best of success with your continued project.