When it comes to the transmission crossmember, I was adviced from other rodders that lifting the whole motor & trans forward and up, was the way most rodders do it when work on the transmission is needed.
Partly because it's not that much work to do it, but more important, most of us don't have a provate car lift (or a big hole in the garage floor under the car).
Then it's of no use to have a removable transmission crossmember. You won't get the transmission out that way anyway. And since this crossmember will be wery important in stiffen up the chassis, I choosed to weld it.