While only 7mm, I purchased close out Borg Warner ignition wires from rock auto super cheap. I bet they still have some. I was ordering filters for my GMC and decided for $5 to add them to the cart as it didn’t add any shipping cost. I figured worst case I could use them on my TR8 as it isn’t temperamental about plug wires.
If you are trying to be frugal, maybe it’s an option?
They are on my current D1 project and seem to perform just fine. To quote a friend, “It runs smooth like a Toyota.” Who knows how long, though. However, when I worked in an auto parts store, literally decades ago, Borg Warner was considered a good quality line.
On a related note, I replaced every gasket and seal (and of course head bolts) on that engine which only had 26,000 miles but sat untouched inside a D1 stored outdoors for over 10 years. It had a mouse nest under the intake manifold and they had eaten the ignition wires. It looked like hell from the outside but was like new inside. Well, one intake valve was pitted and I replaced it along with the valve springs as I assumed some of them were compressed for those 10 plus years and that couldn’t be good. Valve springs and valves are not expensive.
This is my first D1 with an engine not a diesel and not with a ton of miles. I have had the engine together and installed for quite a while but only recently got the rest of it roadworthy. I was very surprised how much power it has compared to my high mileage D1. If I hadn’t installed it myself I wouldn’t believe it is only a 4 liter. I am assuming the main difference is the camshaft isnt well worn like the high mile one. I have put together other Rover V8 engines but they were installed in much lighter Triumphs. A 4.0 in a 2200 pound car is quite enough. So, until now I didn’t have a good feel for how a 4.0 should perform in a D1. Frankly, with the manual transmission, it has all the power I want. I have only driven it 22 miles and it is already my favorite D1. The diesel is cool but it is slow. The high mileage automatic, well, my wife can drive it as it is an automatic.
I have another project D1 that is believed to have a recently rebuilt (it looks the part) engine with 4.6 internals. It needs a bunch of suspension work before it hits the road. It will give me a nice comparison when I do get it on the road. It has super scary death wobble at present.