I wanted to confirm this before I go further--heres the deal.

I need to put Helicoil inserts into my RPM heads. 2 per head , the #2 / #4 holes / rocker shaft stands --the long studs/bolts .

since the threads are pretty far down in the rocker stand...want to be sure on how deep to drill .

so the Helicoil is about .50 deep. Do i need to simply drill the factory hole .50 deep and thats it? Or does the insert need to go deeper in these particular stand holes ??

Checking before I drill !

Im using studs not bolts on these 4 holes