It's always a good idea to mock up these motors before you get too carried away with assembling parts for good. The cylinders didn't fit, requiring sanding, de-burring and plenty of aspirin and head scratching. It's nice if the cylinders can move on the base studs a bit when aligning the intake manifold.
This engine was abused by multiple owners over the years. It has many burrs and dings...and requires checking all sorts of shit before you get too far along. Parts that normally always fit, for some reason don't fit on this thing???? It's just time consuming - and can make a guy go crazy !