From memory, I thought the ones wt cvh engine could be converted by using a ford sierra 5 th speed, without too much fuss.
Not sure if same is pos for your crossflow. Belhousing etc needs to match. There must be TMers that did this.

2025 Plus Six - 1909
2009 Roadster
1983 4/4 4str
Board member Morgan Sports Car Club Holland ('21)