From memory the 480 coupe and the 440 shared the same guts , there was a revision on the engines midway through production.
Early mdl had the porsche designed lump that was a great engine but vovlvo detuned from the original design and the later mdls had a vovlvo designed lump.
The porsche lumps were a great engine with big power potential , seen a few being swapped over to fit the 5 gt turbo.
So you might have some porsche spirit to brighten up your volvo !!