I haven't seen the motor myself, so these locations are just hearsay from the current owner:
on the block /distributor side: N375583 CAL
on the cylinder head, intake and ex. side: 3701887 GM3
on the cylinder head, distributor side B2 887 O66 670
tclederman, I'll send him the link to that photo and get back to you all. As always, thanks for the input!
