Madness

sorry for digging up old thread. I'm just in the process of preparing everything to do same conversion but to a discovery. did you really need rallyaid loom? is it decoding can signal to analog and you connect it to your land rover dash? I was planning to use bmw loom from the car I take the engine from and use clock cluster as wel. does that make sense? only problem I find is speedo as I'm considering 4hp24 which only has output shaft speed sensor for it's own operation.