as ur-so-lo has stated allow plenty of extra $$$$$$. i just did mine. it was out of a gq and going into a gq. the only things i needed was the computer( guy lost the orig), the exhaust lengthened to suit the wags and engine mounts. seems easy and cheap enough, hell got the conversion real cheap to start with.
never, never ever ever again. did heaps of it myself, a great mate made eng mounts, etc but so much small stuff that just blows the budget out. hind sight i would have bolted the td42 in i had in the shed into the wagon, sold it as a great runner and sold the v8 conversion as a unit and used all the money to buy 1 already done. upside is i now have the truck i always wanted and know the hows,whys etc in the eng bay. next is paint job outside for it and fit the cage, bar work, locked gu 4.6s diffs, endless air, 5 link front and triangulated rear end that is sitting around on the old bus and will have effectively turned all my good money into a dirty purple 20yr old 4x4 with all the fruit that i would be lucky to get half the $$ back. but i tell you what, givin it plenty of throttle in the dirt at full lock, 3rd or 4th gear, looking into the trees out the front winscreen and havn to ask the passenger to lean back as i need to see out their window to stay ontrack is awesome knowing that that is only half way to the floor and half way through the torque curve makes it all worthwhile. now i think i should get on ebay and order the bigger injectors and chase another 100 or so horsepower..... hell i have spent this much whats another couple of 100's.
wheres my keys darling, back soon.