Is this your boat?
If so, it came with an Atomic 4 and, as previously advised, a V-drive.
So the question is, did the Volvo you bought come with a V-drive, and you are wondering about the connecting bits, or did you get a standard transmission
(output flange faces aft) and hope to somehow use it?
If you have a standard aft output gear, you'd have to either put the engine in the cabin
, a serious engineering challenge, almost certainly upsetting hull
balance, or get a v drive like this
at 3500.00 used, a pricey alternative.
If your engine has a gear like this, then all you need to hook it up is an appropriately sized shaft to fit into the dark green coupling shown in the lower part of the above picture. if you don't have that coupling, it should be available from either Volvo or a prop shaft company.
Also, if you don't have a V-drive, be aware that getting a non Volvo V-drive to fit can be done, but it will involve a lot
Additionally, an engine set up for a V-drive application is usually laid out completely differently from a rear drive engine, with the common maintenance
items on the rear (now front) of the engine...