ok so a couple of updates in one to come here....
I really liked the black on the valve covers and air cleaner, so much so that I stumped up for these :
Promptly fitted them, chucked in new plugs, new leads, and threw on the new Holley and all was good!
Except when I fired it back up it had picked up a ticking...... whipped the covers back off and had a good look around, no obvious issues. fired her back up and had a good listen, and it didnt seem to be coming from the valve cover area.
Now at this point, what i should have done is thrown some engine flush in, ran her up for a couple hours, dumped the oil and chucked in some new stuff to see if it persisted. But, what i did was listen to people on facebook who spotted that a manifold/header bolt was missing and deduced that it must be the header gaskets....
So new gaskets arrived, started taking the header bolts out only to find that some didn't really need much taking out

. Yup, it would appear whoever fitted the headers last had cross threaded a number of bolt holes, and just wound whatever they could get in real tight an hoped for the best. FML.
So, a couple phone calls were made and the car was booked to be taken into a super cool local garage that work on all sorts from 1920s-2020s, including show cars, track cars, american, rat rods, you name it, they build it!
The owner came out to see the car an talk to me about what i wanted doing etc before transportation was arranged, which i thought was a nice touch. I asked them to pull the heads and inspect/adjust the valve train while they were in there, drill and helicoil the header bolts, and we also discussed some additional bits i may get them to do if the money stretches far enough this month! I also asked them to give me a call when the inlet was off so i could get it painted up.
So yesterday she went off on the trailer to see the guys, and within an hour they messaged me to say inlet was ready for collection
Popped down this morning and had a chat with them about the car - pleasantly surprised when the Mech told me mine is actually one of the most solid and up together mustangs he has ever worked on - most are turds rolled in glitter apparently

The working theory is that the noise was in fact a sticking lifter as the pushrods and lifters did have some light surface rust and pitting, so these have all been removed, cleaned, re oiled and reassembled - Thankfully everything is straight and in good useable condition! They reckon the cause was poor lubrication due to too thick an oil being used previously - yup, the same grade i bought to fill her back up

Sump will be dropped and cleaned, oil pickup cleaned and then everything reassembled with new gaskets along the way, and filled with fresh (thinner) oil.
Inlet came home with me, and went from rank blue (excuse the leads/mess!) -
Stripped + Primed:
And finally to Silver:
ill put the carb etc back on tomorrow, then wait for the new Coolant flange and gasket, and drop it back to the garage with the Gasket set next week when it arrives.
Interior is also out.....

(excuse the mess!)
being dropped to the trimmers on Tuesday so hopefully have some nice mach1 style seats to go back in shortly!
Then i need to get the carpet fitted and new (old as hell, battered, but only set i can find in uk for sale) doorcards retrimmed and they can go in too
Still a million jobs to do, but once it runs right, sounds right, and has a decent interior it will start to feel like less of an impassable list!