Built a 426 hemi. Installed drop tubes,0 rings for sparkplug tubes. Checking to see how plugs are burning and they come out with alot of great looking bradd penn oil on them. Is this the norm for the setup ?

Thanks in advance to all
Thanks MOPARTS

It's normal unless you have the spark plug tube oil damns.

see here for an example: http://www.manciniracing.com/mihehetuseki.html

Thanks.....good stuff....so remove plugs/covers and install ? Can be done with motor in ? Thanks again

It can be done with the motor in the car or on a engene stand, put them in the freezer for a hour or two first and then installed them one at a time Make sure thier installed sqaure to the spark plug holes in the heads, I use small block of wood that is wider than the top of the aluminum seals to help drive and lightly tap them in square IHTHs

Did you install your sparkplugs with the compression washers on them?, if so you probably distorted the tube ends allowing oil into the cylinder via the plug threads and distorted plug tube base...the tube is your "plug washer", discard your plug washers if you haven't done so

I understand...but.....it won't help the tubes now to remove the washers ??

I never trusted the metal-to-metal sealing of them, I always smear a light coat of RTV on them before installing.