Presuming you're doing IDI for the extended rev range? Aside from the "because I can and I want to" angle that gets us all into trouble.
Haha, yes actually, but now it looks like it won't happen :-( My brother is all bummed out about the money he's spent on the race car that he is thinking of parting it out or selling it! So there goes the diesel idea - shame, I had sponsors lined up and everything.
Yesterday I was talking to Darren at "Autpocraft" in melbourne. He works on Landcruisers a lot. He said that 1HZ cranks may be cast...... Suggested the surface quality suggested a difference and he has seen broken cranks (he also said that the new V8 diesel is breaking of 1 and 2 cyls at the rank when injectors go bad and uneven torque between cylinders. He's got probably 5 cruisers on the go at any one time, so see's a lot.
So... I had been of the opinion the cranks were the same quality/simply the same, however perhaps they are not?
If you can find a 1HDT, buy that instead would be my advice - they are a performance engine waiting for someone to bolt a good turbo to and tune.