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NGK '4' heat range if alum heads, '5' if cast iron.

Congrats on using THE great carb!!

It will depend on how thick the Promax plate is. Looking at the countersunk screws, it is probably quite thick, which would allow for machined passages on the back of it.

I don't see a vac adv unit.... If it did have a VA unit hooked up.....could it be a 318 dist [ opposite rotation ]? in which case revving in neutral would actuate the VA & retard the ign

See the other thread...

Get a small, round, wire brush for an electric drill. Use THAT to clean the freeze plug opening back to clean metal. Use silicon on the NEW plug to seal it

The benefit of the aftermarket book: has tips in it to make the job easier, plus 'tricks' that have been learned over time that can add durability/performance to the trans. These are NOT in the FSM.

My understanding: Yukon made two types of gear sets for popular diffs. [1] Was soft material for drag racing that flex slightly & absorb the 'hit'. It did not wear well not as well finished [ two gears lapped together ] [2] Street gears of harder material for long life that were lapped as a set...

I never liked the oiling system. The torturous path the oil for the pump inlet, numerous bends & restrictions in the p/up tube then the horrendous, turbulence causing, drilled intersecting holes in the block. I plugged the block. I silver soldered a 3/4" OD, 1/16" wall thickness, stub to the...

Block looks like it had a brace over the freeze plug to stop it 'departing' the block...

And how do you know these housings cavitate? Is it because the engine overheats?

[1] Fitting on the intake runner. Use that for a vacuum device: brake booster, headlight door, heater vent door. NOT for PCV. Those rubber block off caps are notorious for cracking, causing air leaks. [2]. PCV. Might have been disconnected because it was gummed up. A working PCV will rattle...

If the coil is designed for use without a bal res, using a bal res with it will result in less spark energy. Silly move.

You only need large ring gaps with hypereutectic pistons. Is that what you used?

Kern, The two door black 'Dart' was just called a Valiant here & there were two models, VF & VG designations sold between 1969 & 1971. Biggest engine available was 318. These cars were ' left over' 1967-8 US Darts. The bodies, from the front windscreen back were shipped complete to Oz...

If there is a repair book on the 727, get it! It will have tips & you can make sure things are done in the right order.

You could nip up the oil pan bolts...& get lucky. But my guess is the rear seal or seal holder. When the engine is running, blowby increases pressure in the crankcase & helps find ' bad' seals.

Because it heats up so quickly, I would be checking for a blown/leaking head gasket.....especially on a newly re-built engine.

The relay is a good idea. If the ign coil is an E core, it will draw more current. To get the best use of the relay, connect one contact to the battery [+] terminal or alt post with a 10 amp inline fuse. Connect the other relay contact to the module/coil [+]. This will ensure that your ign...

Should not be loose. Loose means it has clearance.