I did a similar build using the Eagle forged kit and ported 351 heads. Are you sure that this is balanced to a 28 oz. flywheel? I ask because when I bought mine, it was only available neutral balanced.
The notching template is a pretty neat piece; sure saves a lot of trial and error mocking up the actual parts. I also ran a main stud girdle and windage tray, so some more notching was required to get everything to clear.