I am installing my heads with ARP headbolts. I was going to use that dark grey moly lube on the bolt head and washer. Should I also lube the threads, too?
Was going to torque 70-75 ft lbs. Sound about right?

 

We put the lube on my buddies threads, under the washer and between the washer and head of the bolt. The bolts did not come with the ARP lube so we just used some assy lube and went to 75 ft LBS in the end.

 

They can go in a number of different ways. If you are using lube it should be applied to the threads. There should be a chart showing you the torque readings based on the lube applied to the threads as it will change.

"1. The friction factor changes from one application to the next. That is, the friction is at its highest value when the fastener is first tightened. Each additional time the fastener is torqued and loosened, this value gets smaller. Eventually the friction levels out and becomes constant for all following repetitions. Therefore, new fasteners should be tightened and loosened through several cycles before applying final torque. The number of times depends on the lubricant. For all situations where ARP lubricants are used, five cycles are required before final torquing.

2. The lubricant used is the main factor in determining friction, and therefore, the torque for a particular installation. Motor oil is a commonly used lubricant because of it’s ready availability. If less friction is desired in order to install the fasteners with less torque, special low friction lubricants are available. With special lubes, the required torque can be reduced as much as 20 to 30 percent. It is important to keep in mind that the reverse is also true. If the torque value has been specified for a particular fastener on the basis of low friction lube, installing the fastener with motor oil will result in insufficient preload; the torque has to be increased to compensate for the extra friction caused by the motor oil."

.....source ARP Tech Info