I have a 1947 46S and a 1994 Raodmaster. I want to clip the '94 front & rear chassis and put them under the '47. Is there any specific point where I should make the cuts in the frames. The '47 has a 121" WB and the '94 Roadmaster has a 116" WB.

If anyone has done this, pictures how they made the frames join wiold be appreciated. Actually, guidance of any kind would be appreciated.