Dana 18/Spicer 18 to Volvo M45 gearbox adapter

A jump in time to around December 2004.
Until now the Jeep project has been on hold, but now I have a garage and I'm planning on getting some work done on the Jeep.
Even though not much work has been done, I have spend a lot of time planning want to do about the transmission and motor situation.
And conclusion is to go for a Volvo B21 motor and a Volvo M45 4 speed transmission. This choice has been because the Volvo parts is cheap and easy to find here in Denmark.
The plan is to build an adapter between the M45 and the Dana 18 transfer case.