isuzu engine into 1850d

can anyone tell me if a 6BG1 motor will fit a inter 5 speed in an 1850D...was fitted with a perkins 6354

The truck has a #3 SAE housing,so if the mtor has a #3SAE housing,that will fit........the clutch used is a Fuller Mini Anglespring,but its not all that difficult to match clutch plates to splines.It will probably be longer than the Perk,so mounts will need to be made up........However ,older Isuzu parts are no longer available,and I think using a Perkins Phaser would be a far more sensible option.