Likely easier to describe how Ford did it rather than list each nut or bolt individually. Hopefully we'll get everything - if not sure someone else will point out what I skipped over so you can get it right.
1- On a 67 390 you would have an assembled long block. Block, crank, cam .. all the internals plus the heads all bolted together so all those bolts are installed
2- Then the oil pan (with plug), timing cover, water pump, intake, thermostat housing, front & rear intake vacuum fitting (not the block that attaches to the rear fitting), the vacuum balance tube - hose and clamps- between the two fittings. The PCV hose, 90 degree elbow and PCV valve all attached. This would include all the mounting bolts and hardware for these items - gaskets too
Don't know if a pair of painted style valve covers were placed over the valve train for painting - no evidence I've seen points to proof so far but really doesn't matter allot for this application.
3- For Thermactor cars the injector tubes to each head and check valves on each were in place when the engine was painted. Check valves has a mask on the nipple where the rubber hose would attach later
4- Masks were installed over the fuel pump attachment point/flange. The water necks Also. Can't recall if the face where the oil filter adapter would be attached is masked off to keep paint off the mating surface but that would follow the logic of that other surfaces.
5- I think the exhaust manifold debate on the big block FE's adds a twist since I think it's still being debated in some circles. Hopefully some of the 67-68 judges will offer what the current MCA expectation is. If you're going to shot the engine with them on the top , front and rear surfaces will get some pretty good color and we expect it to discolor and turn color as it would have originally done if there.
I would consider first coating the block and heads behind the manifolds before I bolted them on to reduce the chance of rusting back there. I just used some cast blast on the last engine I did to at least try and reduce the possibility not sure how well it will hold up and its pretty dry around here.
6- So at that point everything gets a nice coat of paint (lots of corners and hard to reach spots so check it a number of times for shadows and bare spots. The hose that goes out to the fitting and PCV normally is painted part way down the hose with the overspray fading away after approx the mid point. Have seen overspray out to and onto the fitting and the top of the PCV on original 67 390's in Mustangs over the years.
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Once you get further we can discuss the valve cover gaskets and the "staples" unless you've already got that detail covered
And yes putting a Thermactor system from pieces can be a big challenge especially considering the multiple different changes through 1967 production. The one I love trying to find is the odd little washer that goes behind the adjustment bolt on the pump that has the little "ears". Is yours a shock tower mounted filter can?
Hopefully I didn't miss much - going from memory
