Help sourcing an engine...

[konarider98]

Hello X5'ers,

I came here for help finding an engine that comes in your beloved X5's. I'm in search of a 4.6 or 4.8 to convert to obdI and swap in my 540. i have heard these are pretty hard to come by as the engines stick with the duct taped together cars mostly in the middle east

Two questions.

Can I use m62b44 head on a 4.6 or 4.8 block? if so, which head gaskets and head bolts?

Thanks in advance for all the help, Tyler