Have a read here
Thread 'VDJ79 H150 into HDJ80?' VDJ79 H150 into HDJ80? - https://forum.ih8mud.com/threads/vdj79-h150-into-hdj80.1140821/
There's loads of info on various gearbox swaps
There's also other threads in the Diesel tech section that will be relevant, including discussion on H152F