what is the best cross member 2 use when putting a l20b in2 a 1200 ute please help its a 85 model

you'll need a custom crossmember for this

ie weld L series mounts to 1200 crossmember

best one is the one you already got. Just notch it and weld new mount plates... or section the oil pan to fit the unmodified crossmember.

If you are looking for one you can buy, i don't think anyone sells one. Nissan used to have one, but is no longer available.

as ange said, stock 1200 x member, take off the stock mounts and weld stanza ones on- eaiset way but not that easy. few memebers have done.

my dodge spare is at jmacs currently, really need to get out there to pick it up still. The dodge one makes the L sit too high in the bay, so needs work to lower it in the bay.