I do have a warning for anyone working on this engine.
Be very, very careful about pulling your oil gallery plug, above the intermediate shaft. The machine shop that worked on my bock pulled the rear plug, and once replaced it leaked like a no one business. The oil pressure pushed the plug out, they use a imperial plug.
I looked online, check this form, found a online store Techonic Tuning (sp), bought what they offered as the properly sized item...once again didn't fit.
At this point I was very, very good at pulling my engine, and putting it back it...also fairly short tempered!
My solution...Drill the whole out, tap it with 3/8 - 18 NTP tap, and plug the B....
No more leaking. You want stress though... Used a lot of grease, slowly drilled it out, very slowly... and very slowly tapped it.
Moral, talk to your engine shop and make sure they can replace the plug properly if they pull it. I know it's a good idea to pull it when tanking the block. but make damn sure they can plug it. Nothing so much fun as fighting with a leak for 3 weeks, that never should have happened.
The shop I used is probably the only shop you can use in central Alberta, sad that happened.
Brad