With some massaging you can fit the box in the tunnel but dont waste your time get say a 120y tunnel (best fit) or stanza/bluebird/200b/180b tunnel. Get a maddat motorsport swaybar as they allow for better engine fitment. Usually will need the l20b to be out of a bluebird or at least get a bluebird/stanza sump and oil pick up for better clearance. There is no bolt in crossmember we found a stanza crossmember carefully removed the mounts after measuring there positioning on stanza x member and then positioned them the same on a blank 1200 crossmember. The l20b is the hardest L series to fit as the block is 11mm taller than say a l18 or l16. You would be best to scallop the crossmember and put some gussets/strengthening in it before plating it back up. Struts theres a wide variety you can use see to the left << in Tech Wiki. if the ute is post 74 then it should have the h165 diff in that case it will handle the l20b if your not trying to leave dirty black marks around the town or launch it. Theres plenty more to tell but im sure others will add more like PIGDOG and Unfamilia. This makes me realize we need to do an article for engine conversions about this.