Thread: 348 Chevy Screw In Studs

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I am in the process of rebuilding a 348 chevy for my 1933 Ford truck project. In the process my heads were cracked and of course it had to be a stand alone year, so that I had to have heads from that one and only year. Found a set and had them shipped from Oregon to Alabama. In the shipping they got beat up some, not too bad but I am going to have to replace the rocker studs.

Is it possible to buy the fixture to surface the stud boss and drill and tap for screw in studs? My machine shop does not want to do this so I am on my own. Any help or information would be great. Thanks

Roland

"Back in the day" we used to just drill through the boss and stud, and drive about an 1/8th inch roll pin through them. I did it on a dual quad 409 that had a Z11 cam in it. I found out later it was bottoming the valve springs out, but after pinning them, it would break the moly push rods before it ever yanked a stud!

you could drill and tap them for 3/8 3/8 stud or 7/16 bbc stud and use the bbc 65to90 rocker arm. it is no big deal to do on the mill .i can not see why they will not do it . i am machine shop and i do them

Think I'd be looking for a new machine shop.....screw in studs aren't exactly super trick to install.....

Dave and Pat, While I am "NO" machinist and don't claim to be, I agree with both of you. I do need a new machine shop and I thought screw in studs were no big deal. Trouble is small Southern Town and not a lot of choices or another words One Choice.

So I'm going to have to figure another way around this barn. Gots to be away for me to do this myself with some amount of precision. I mean I realize I'm not building a watch its screw in studs. Gotta be a way!

Roland

Better make a road trip and find a real machine shop!!!! Studs need to be put in correctly at a precise angle and set to the correct height. Not real familiar with a 348 head, but I would also imagine the stud bosses are going to be cut down some and machined flat, especially if you are installing rocker studs with a shoulder!!!!

Should be done on a cylinder head machine, can be done quite easily on a vertical mill, and if you know what you're doing even on a mill/drill machine.... As with many things automotive, there are more ways to do it wrong then there are ways to do it right!!!!

the EZ way to go about it is to box the engine ship it to me if they will not do studs what about the rest of the work?? how good will they do that ? you can do the rocker studs with out many tools but its not fun .you will have to press out the studs and tap the studs out to 7/16 or press in new studs back in and pin them. i have used done them with my seat and guide machine to do the job or my mill with the tilt table .by hand would be tricky at best there are studs with no shoulder so you should not need to be spot face .not to big of deal if they need to be done if you have the spot facer