For the torque coupler, I would buy new. They don't cost too terribly much and are engine specific to the crank, you will need the studs and nuts though.
I have to look and see what bell housing I have, I can't remember if it an early or a late
Did you get any hardware with the inner transom bracket? Like two fiber washers, two long bolts, two bizarre looking springs?
I have the power steering pump and cooler you need.
I have the crank pulley, belts, alternator bracket (the alternator is on my Carrera motor), belt driven seawater pump, thermostat housing and hoses, basically all the crap from a Mercruiser 454 less torque coupler and alternator, including most of the Thunderbolt V ignition system should you decide to go that route.
An a different note, the shaft for the front of the rams is not a bolt, but has "E" ring clips just like the rear.
The transom assembly I told you I thought I could could get is not available, the guy that has them is in Afghanistan with the Army reserves, thankfully he is only going to move out the US troops

... Told him to bring me back a well used HUMVEE.

My wife may be going to Pasadena in May, I will let you know. (We will likely drive)...
GT