Now aren't ya glad ya didn't crank it before pulling the plugs?
And, whata relief! (Not a head gasket, I mean!)
You'll want to change oil and filter before venturing out again. I think most of us are following Marc Haibeck's recommendation and using Amsoil AMO 10-40; it has the "right stuff" in it for our flat tappet cams.
That #8 plug... I bought a plug socket with the built-in knuckle on top. To that I installed a 2-1/2" extension and taped the two pieces together to keep them from parting when extracting the socket from the plugs. Then, the socket will slip into the #8 and the knuckle allows the extension to follow right in, leaving the end of the extension peeking over the top of the hole when the socket is seated over the plug. I have a swivel-head ratchet that easily slips onto the end of the extension, and after torque is broken, the wrench comes off and I can hand turn the plug out. (Don't forget to put a little anti-seize lube on the plugs before installing them. Ya don't want them to seize and possibly damage the aluminum threads next time you extract them.
)
FWIW, I installed new Accel injectors about a month ago. Oh, what a difference it made...Shweeeeet!
Glad you found your gremlin. You can put that behind you for and other dozen years or so!
P.