I’d rather not use Holley/MSD stuff. It’s aimed at the high-horsepower, GM V8 scene, grossly oversized for my 125 hp engine. I find Holley’s tech not all that well made, and definitely not OEM quality (though OEM quality is highly variable… and aftermarket replacement parts can be sketchy). Those are $100 per coil, and I need six. The stuff is physically huge. And if one fails, they have to be ordered from Holley or Summit or something. I’m making 20 hp/cylinder and it can’t possibly rev past 4500 rpm.
The last part will get me flamed but tough shit: Holley’s support forum for their EFI is admin’ed by a guy I had to battle to even sign up to. Bible quotes on every reply. Shitty and officious and incorrect technical advice.
But it’s also more interesting to work out properly-scaled OEM stuff I can adapt from junkyard sources.
I will go look at Nissan too, thanks for the hint! A coil-near setup will be tolerant of some lead length too, I kinda don’t want to “research” subtle coil behaviours that result in failure “later”!