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There are adapters available, sorry I have not had the need to buy 1 myself, but search on ebay I think should give results.

Think your after something like bottom left in pic.
sorry it's all I...

Yep, I think your making the right choice. Just don't put too much boost in it and it'll give your reliability. If you rebuild the 4.5 put in bigger rods from the 4.2 and then you can boost away.
I...

X2 Robo. Rebuild and convert to petrol only with a new turbo setup. You'll get more power than an LS2 or equivalent conversion and outlay half the money if done right. Your fuel consumption will...

Recon stick with TB45.
Add turbo and you'l have all the power you want and then some.
You should find fuel economy improvement to.
Providing you don't think your D Johnson.
Turbo will help you...

$15k for a td42 conversion? what nutter told you this. good running engine can be had for 3-6k then flywheel box etc is $1500. then you pretty much bolt it in and drive away. only need to change...

Think I second the vote to reco the 4.5. Could do some head work and get some more hp. Otherwise build it to suit a turbo then your laughing. Ive done engine mod swaps and it always costs more and...

Personally i would reco the 4.5
would not even consider using any form of gm junk ever again .

Go with a common engine I am in the process of doing a VH45 conversion and everything that can go wrong will. Although it is starting to come together now. If you are going to pay someone to do it...

Is a td42t conversion out of the question? Going to the ls1 will be good but you will be paying an extra 300 odd dollars for rego and possibly increases in insurance. The ls1 will prob use less fuel...

How many kms have you done?

Mine does 300 km city driving on 82 litres of lpg.