Rebuilding a junkyard ls (okay yours isn’t a 5.3 ) is like the rite of passage
Does 312 mean anything to you?
Edit: it's you--I stalked your comments. Emacs? Christ, I thought I showed you a better example.
For example. The engine has EV6 Bosch injectors, a completely standard off-the-shelf part. A seal kit (i.e. a bunch of o rings) for the injectors is maybe $20 from Fel Pro. If you go by the Mercruiser part number for the kit it's - get this - $297. Two hundred and ninety seven dollars for sixteen tiny rubber o rings.
The photographs (just to keep it on topic) are basically all around the accessories bolted to the heads and block. A remote oil filter, the heat exchanger, the particular fuel boost pump it uses, all with weird brackets and spacers and eight different types of bolt.