Landcruiser v8 conversion

A 253 would be I think a backwards step(unless modified)
A chev may be a cheaper option?
Either way it will cost you a LOT of money, if you work out how much you think it will cost just double it.
Ive found the better option to just go and buy a better suited vehicle to what you need.

are you a mechanic ?? if the answer is yes , or very mechanicly minded , go for it . if you are limited with your mechanical skills , I would probably not do it .
just my opinion . They always need some attention and I have seen some pretty bad conversions around.

Andrew,
I'll second Simon's answer, I was looking at doing a conversion only a fairly mild mod (ho ho ho), your insurance and the police licensing centre would be my first port of call before Marks adapters, I learnt the hard way, I didn't get burned more like singed, luckily I hadn't got to far down the track. It's thanks to this forum and the advice I got that saved me from wasting a sh*t load of money. I don't know what Australian state you are in, I thought WA would of been "easier" because we don't have the annual inspections, but since late 2002 the regs here have changed and things are a lot tighter. Just a bit of advice. Keep the shiny side up