'68 318 to carbed Magnum 5.2: Check my checklist
Good news today. Intake bypass nipple arrived and I had time to get the engine to TDC at the compression stroke, so both distributor and bypass hose have been installed.
That said, Felpro's master gasket kit had the wrong distributor O-ring in the kit. I couldn't get the distributor seated - not even with some light taps from a rubber mallet.
I happened to have a genuine Mopar distributor O-ring spare left over from my '98 Dodge Ram Van (the Magnum 3.9), and sure enough, the thickness of the Mopar O-ring is smaller. Small enough that the Felpro O-ring had a line cut around its entire diameter from my attempts to seat it.
By comparison, the Mopar O-ring allowed the distributor to slip in with no more than the light pressure one would expect. Feels nice and snug.
-Kurt