Which ones SIZE
 

1.) Ok if i go with slipperential and non extended chassis what size dogbone works to replace the extended pne for the back 101mm or 72mm or neither.
2.) Ok if i go with the flm chassis which dogbone do i need to replace the front dogbone the 72mm or the 101mm or neither. I believe on this setup this cvd i need is standard size for the front maxx cvd.

The Slipperential only works with the G2 extended chassis if I'm not mistaken.

You can get shorter shaft by asking, says so in the store

what is the shaft size