Center driveshaft questions

[lincpimp]

Ok guys, need some assistance here.

I have Metalman's old revo, with the homemade slipperential setup. I need some sort of cvd or dogbone for the front drive. The ends would have to fit the revo diff input (pinion) shaft, and have a revo style end at the trans/center diff. The center diff has mike's custom diff outputs to allow the stock driveshafts to be used. I currently have a stock driveshaft on the from, however it rubs the steering mount, and I have turned it down as much as I can.

Mainly wondering if a cvd or dogbone would be better? I have a cvd rear shaft, and would like a cvd front. How would I measure the length needed? Front the non-cvd end to the center pin of the cvd end? Or the entire length without the drive cup? Any suggestions would be very helpful!