Pretty sure it's an A13 ('74) motor (its not in a Nissan, it's in a Morris Minor), and I have a manual for specs on the way, but have started disassembly for a blown head gasket.
Is the intake manifold only held on by the 4 upper visible bolts? Not budging with whacks with a rubber mallet and the motor appears untouched.
What's the proper way to coax this off?
I think exhaust will be easy with everything exposed.