Advice for TH350 Transmission Swap on 62' C10

[dhamilton62]

Anyone have any tips or advice on swapping in a TH350 trans into a 1962 C10 long bed? The truck already has a 350 SBC in it from the previous owner, using the front horseshoe style motor mount and bellhousing mount from the 4-speed. Would I need to change to the later style side mounts since I'm swapping the trans and removing the old trans cross member and making a new one? ( Has the x-frame so I think making a new one is probably easier) I'm just worried about getting everything lined up right and also if the motor will have enough mounting points and support. Also, I don't have a lift to drop the old 4 speed trans out, so I was going to just pull the motor and trans together, pop on the new TH350 trans and re-install both. I've been reading as much as I can on the topic but any advice or tips would be great! Anyone have any links or good threads they'd read about this swap? Thanks in advance to everyone.