You can take the 2.5 24 valve block all the way up to 3.0, 3.2, 3.45, or 3.7 litres... (Don't do 3.8...)
You can also keep it a 2.5 with the smaller valve heads on there....
Because of all of the other B.S. please email me at
john@reginaceleste.com or call me at 425.941.4747
I have a block and either size heads for you ready, to go....
...to Alfa, or not to Alfa? That is the question...