Daihatsu newbie need general infos about Hijet 660 EFI turbo

Hi, I recently bought a 1990 Daihatsu van with 660 EFI turbo. I bought it for cheap cause the engine was defective.
That's my hobby to restore old cars and this one is my new challenge but, and it's a big BUT, I desparetely searched the net to find infos and help and there is not much about those 660 turbo EFI.
For now I wanted to know if these engines have been used in other Daihatsu models and for what years. It looks like there is only on shop manual that covers Hijet vans and this manual does'nt include the turbo
I'll deeply need the vacuum diagram for my model but is that completely covered in the shop manual?

Any help appreciated.

There are very few 660cc hijets in the UK

But if you ask on minitrucktalk:- http://www.minitrucktalk.com/forumdisplay.php?4-Daihatsu-Hi-jet

Those yankies will sort you out!