Re: which coil mfr. to trust?
Just yesterday I replaced the coil in the cap of my hei with a remote coil setup. I had already bought the stuff to do it, and it started acting oddly at idle and just off idle. It would knock once every now and then, like over advanced timing but only a single knock. I figured it was either failing plug wires arcing or the coil starting to fail. I went ahead and did the coil upgrade, problem gone. Yes, coils can start acting up and then stop for a while.
'71 chevelle, 468, TH400, 12 bolt posi w/3.08's, drinks a lot of 87 octane.