Question on head gasket

[olman]

   Before I put my heads back on I was looking at my Perma-Torque head gaskets for my 67 390 and noticed the hole for the rocker arm oiling was kinda small. Does this need to be enlarged or just leave it alone and use it for a somewhat restrictor for the rockers?

[blykins]

It's fine the way that it is.

[67428GT500]

No. It's an internal oil restrictor.   Most of us run the Fel Pro 1020 head gasket as well in a performance application.

                                                                                       -Keith

[olman]

Okay now I should ask if I need to use a restictor in my heads. I have a new Melling hi volume pump and Arp pump drive and just installed .010-.010 crank and new bearings, the rockers and shafts are almost new. A new Milodon 5 qt pan. If so, does anyone make these and sell them for the FE engine? Do I have to tap the oil hole? I saw 1 post that a split roll pin was used. Never thought about this until I saw all the info about how much oil goes to the top end and before I put the heads on would like to know if I should or not. I trust this site for the vast amount of info that can be found here so that's why I am always asking.  Thanks

[67428GT500]

I am running a holley #70 jet in both heads. even with the incorporated restriction that is part of the 1020 head gasket. I am running a blue printed HV pump, roller rockers, stands and the HD shaft from Precision oil pumps. I primed the engine with a drill motor and there is a ton of oil on the top, even with the  restrictors.  I run about 80 lb cold and about 35 at idle hot.

                                                                                                            -Keith