Very nice job! I have done countless GM 3100/3400 LIM gaskets. Every job seems to go the same, but have its own little annoyance. When going back together, you can install a GM small block 350 distributer seal under that oil drive gear along with a new o ring for added leak assurance. Also make sure the pushrods go back in the correct order exaclty since the intakes and exhausts are different lenghts. Then when it is all back together, turn the motor over by hand a few times before you hit the starter to feel for and valve/piston contact. Just in case a pushrod got mixed up you dont bend a valve by cranking the starter (been there done that).