The Speedhut fuel gauge doesn't really like the original Torana sender, it works but the reading can vary a lot. I suspect the old sender just can't hold consistent resistance any more (if it ever could), the original gauges would have smoothed that out a lot more. I've also never gotten around to a...

Nothing wrong with rope seals once properly installed, it's the installation that is difficult with the seals available these days so we go looking for simpler solutions. The lifters sit in high-pressure galleries so it will be pumped down, not just fall. Seems like it should be a small enough area ...

I'm considering 11:1, 242/248, alloy heads on NPD100 fuel. Your combo gives me confidence. What is your intake closing degrees? If it were me that seems reasonable. If you run my numbers through a dynamic compression calculator it's on the low side, 11:1 static would bring it back up and alloy head...

I have a 355 with cast iron early heads around 10.3:1 static compression with a 242/252@50 cam. In hindsight I wish I'd bumped the compression a little more, it has no issues running on 91 octane with the right tune.

This is possibly clearer

Pretty sure the confusing part is just that the V6 diagram and firing order is incorrect. GM uses standard numbering so a V6 is (front at left): Driver side (in AU/NZ!) 2 - 4 - 6 1 - 3 - 5 Passenger side and the firing order is 1-6-5-4-3-2. This aligns with each coil firing pistons in the same posit...

I'm not familiar with the setup so just spitballing here, I assume it's something like this with an extension/adapter to the original input shaft? https://www.marks4wd.com/mfk129.html Where does the bearing need to mount, on the front of the shiny tube or using some sort of spider legs back to the b...

Nice work and thanks for sharing. I'd think an amp with high level inputs (is that still a thing?) would be simpler than modifying the head unit and just as effective. If memory serves a hard-wired phone input may have been an option in which case it should be easy enough to get an aftermarket bluet...

Might be this one?
viewtopic.php?p=13550#p13550

and?
viewtopic.php?p=53084#p53084

Given the number of steps you're seeing it seems unlikely that there is a physical issue, you just need to tune it not to open so far. As long as the pintle seats correctly and it has a fairly consistent/incremental rate of opening then the overall hole size doesn't matter (other than noise). There ...