While rebuilding my stock 081 cylinder heads I would like to install screw-in studs to support a bigger than stock cam and the required valve springs.

I am planning to go with the Comp Cams RP1417-16 rocker arms. I tried to search which ARP stud I need (134-7101 or 134-7104) but don't really found a clear answer. I think that I should buy the 134-7101, but some clarification from the experienced guys here would be nice.

Other question is that how much should be machined down from the cylinder heads when installing one of those ARP studs having a hex base?

 

Anyone?

 

I would go with the 134-7104. It is the same cost and gives you room to go with a taller spring later if you decide to go with a bigger cam.

That being said why not get 7/16 studs rather than 3/8? They are much stronger and not much more money.

 

To be honest, I did not even consider using the 7/16" studs. I just checked the rocker arms for 7/16" studs and it seems that those are at least $100 more expensive than the 3/8" ones. By the way, this is "only" a 305 build so I think that I will be fine with the 3/8" studs.

If I go with the taller stud kit (134-7104) would it cause any clearance issue at higher lifts (0.48-0.49) ? I mean that case when the stud is taller than what my rocker arms really need.

 

It should not interfere with the rocker arm geometry at all.

 

Thanks for your help, ian.

 

On the subject of clearances with 7/16" studs; will they, and their respective rockers, fit under stock (with supports clearanced) centerbolt valve covers?

 

Every time i have put the money into screw in studs i also get some nice aftermarket valve covers so im not sure if they will fit under stock ones. sorry