If you have a five speed, or Auto wagon, then the diferential [the middle bit] should be a H165, with a 3.9 to 1 ratio. This will be good in the ute.

I believe that the use of bluebird struts is not a popular conversion due to the difficulty involved. Much better seem to be the Stanza, 180B & 200B struts. Im' sure there is a technical article on it somewhere.

I also believe that the L18 engine & the 180B crossmember are the go. Once again, i believe that there is a technical article on it in here. Use the search bar, or just cruise the site, & when you find the relevant item, read it several times. That way you can avoid making mistakes that have been done by others.
There seems to be little that you can really use from the Bluebird, & try to avoid using parts, just because you have them. Use the right parts & everything will work out well.