Outer Limits 4x4 Board

Hope this is tech enough! Bit of a 4wd noob and I will get local mechanic to do all work apart from regular tune.....

The opportunity:
89 2door 2.4l Diesel with aftermarket Turbo (arb sticker on it)

The Issue:
1) Timing belt done at 150K - now at >250K so due again.
2) The turbo is leaking oil from the circular seal (i think) which is the air compressor part, leaking onto road and over alternator which I just had to change over because of damage to it and regulator - $800 to auto electrician...

I think also contributing to a bit of smoke in exhaust.

A mechanic had a look a while ago and said was not really fixable....but I dunno?

Here are the options as I see them. Pls suggest the best way to go - cash is a consideration due to my first mortgage ........

A- Change timing belt & water pump & fix/replace turbo - is only a small turbo and no intercooler.

B- Engine changeover to 2.8l diesel - no turbo - apparently a bit tricky from the older type engine - if I can get a 2.8l diesel.

C- Buy Holden V6 conversion Kit, find engine and get changeover done.

D- Buy Holden V6 conversion Kit, find engine and get changeover done and get LPG conversion at same time.

E- least favourite option, trade in. I like my 4Runner!

Any advice appreciated - for mechanics as well - feel free to PM me. I am located bayside Brisbane - considering local BP mechanic or ARB mechanics, new to area.

The easiest, cheapest option is A

Don't even bother with B unless there is a turbo involved

I am doing C atm myself and it will cost more than A+B if you have a mechanic do it...

D is also up there right next to A but not really feasible by the sounds of it

A or E are the only two option if you are trying to be cheap with mortgage payments etc

By the sounds of it i'd go A as you can do T/belt look around for cheap turbo or save for a few more weeks then get turbo done to pay someone to do a V6 before gas would be up round the 5G i would think.

Option A or option F, late model fuel injected 2.7L 4cyl, 3RZ-FE engine.

Option F you would have installed running in your car with paying someone done for 4K. You wont have the cooling and associated problems you do with a V6 conversion.

Buddy