You dont need to grind if you bottom tap.

 

Things may have changed, but i bottom tapped and still had to grind. Don't forget to suck out the holes with a shop vac and tubing.

Ron

 

do you have to do the same thing on a 3rd gen. i will be doing my friends truck soon and i need to see if i have to do the same thing.

 

Thanks for all the advice guys. I think seeing that I have the offer I am going to try and bottom tap just for that little extra insurance.

 

On 3rd gen bottom tapping is advised as well. If I would have bottom tapped to begin with I wouldnt have had to grind my rocker housing down at all ( )

 

when you are bottom tapping the holes how much more threads are you really adding

 

Enough to make all the studs sit level

 

supposedly ARP came out w/ a new PN that is a little shorter and doesn't require grinding the valve covers, but I'd rather have full thread engagement and not have to mill rocker stands to get it!!! if you bottom tap, it doesn't take but 10min of grinding for all 6 covers

 

hey guys i didn't see what studs you all were talking about, is it the 12mm or 14mm head studs, i heard that there is more work involved on the 14mm but never heard of tapping with the 12mm, please fill me in on whats what, thanks

 

I'm going to install a set of ARP 2000 12mm studs 2 day air to my door for $444.

 

65fury,
The 12mm's can be installed without bottom tapping.
On our engines/blocks there is more hole than there is thread if you know what I mean. And 100% of the time all of the holes threads are not at the same depth.
So that is the reason we bottom tap. Not only does it insure maximum thread engagement for the stud but it also looks good and right!
14mm are a whole different subject. When installing 14mm's you have to re-drill the block to a larger size and re-tap each hole to 14mm. There is also head work involved so it will accept a larger stud.

 

thankyou for the insite, and how much do you usually bottom tap the holes? 1inch-2inch? less?

 

The holes are blind. You'll know when you reach the end.

 

ARP wants you to mill the rocker pedistals now. They include a shorter rocker pedistal stud so there arent any valve cover issues...

ARP P/N 247-4203