727 beginner question/verification

Hi all,

as part of my Dart purchase I got a spare tranny thrown in, a 727 from a Fury (as per previous owner). I was planning an engine swap and am thinking of going to a 5.7 and I know some 727's bolt up but this appears to be the "big block" variation that I'm not sure bolts up the 5.7.

I'm looking at pictures to decipher between the two and wanted to confirm that I'm correct this is the big block 727 if anyone can tell from the picture. If so I'll have to research if there's anyway to use it as is or if I should swap the guts to a small block 727 or sell it etc.

Thanks!

727 pic.jpg