All are old enough to prolly need a refresh. A worked over 2.7 (pistons, cams, carbs/EFI/MFI etc.) wil be as much $$$ or more than a refreshed 3.2. For that it won't have much more HP in street trim and require way more fiddling to keep sharp.
That said I'd love a 2.7, MFI, S cam motor in a '72 RS tribute