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congrats on getting this far

it is common to use a gutted pressure plate to connect to the dyno- this bolts to the flywheel and then the dyno connects to it. If you ask the shop and you don't get a straight, clear answer as to how the power flows then this is an answer itself-- a real pro will have done this many, many times

do you have the capability to start the engine and break it in and get the carbs and basic timing set before going to the dyno? this will save you big money. I would be very surprised if the jetting of the 40s works with the new configuration-- so as Chris says above, working backwards from what you are trying to find out, which is AFR across the power band, a pair of 02 sensor bungs in the exhaust are a great idea

if you can get it started, then getting the idle mixture, correlation and side-to-side balance set up should take an hour or so-- again, you don't want to let it idle, follow all normal break-in procedures about varying the rpm so the rings seat. Also set and check the timing curve and err on the conservative side, you will be sneaking up on maximum timing on the dyno, but you don't want to be there on your first pull

I'm sure you get this but it bears repeating that when you finally get ready to do your first pull, all the details should be sorted out-- the dyno stand should come with its own oil tank and +12V, you supply the ignition system you want to use, exhaust, everything else, just like it's ready to go into the car.

this way when the first pulls happen you can be confident that you won't see an aluminum hailstorm and can focus on what the dyno instrument is really good at-- getting the fuel curve and ignition curve set and making pulls to determine best power

if there is any equipment you want to experiment with to see if it makes more power, have it ready to go on the engine right down to nuts and bolts-- I would even go to the extent of bolting it up beforehand, then removing it so you know you have all the right fasteners, tools, everything you need

at the dyno time is money and you want to have the maximum time to iterate alternatives, that is the fun part

see my thread called "the final exam" for some photos of a well set up dyno cell

and have fun!