if you have a ute newer than 1976 i think, they have the larger diff. then you will need to get a tailshaft shortened to suit
and you will have to make up your own gearbox mounts and crossmember most likely

if everything you bought came out of a 1200 then it should bolt up, if its out of something different then no it wont bolt up

dellortos still have a choke, you will need a twin choke cable if you want to run it properly though
and you shouldnt have any problems running it without the choke anyway