Wow, 174,000 miles and it looks that good?  Why did you decide to
rebuild it? Head leaks?

Be sure to measure the crank journals and rods, both ends.  Are the
cylinders within spec?  I don't think I would re-use a cam and lifters
with this many miles.  How about the studs? any corrosion?  Head mating
surfaces?

The two things I have done are grounding the right head to the major
ground point on the left side, and using No Rosion
(http://no-rosion.goshoppingonline.com/index.asp) along with Autobahn
coolant every two years.

Stuart