I got some new Vortec heads and they need some work.
I was looking at guide plates in the Summit catalog and it asks, flat or raised. WTF? And what size screw in studs do I need?
I also need to get the valve guides machined down. Isn't there a tool I can buy to do that myself? I'd like to do as much of this myself. Part numbers would be awesome. Thanks again.

Brad...

 

All small block chevy studs are 3/8 base, with either 3/8 or 7/16 studs. The top part is either 3/8 or 7/16, the bottom part is 3/8 on both.

I am pretty sure you need the flat guideplates, but don't quote me. Make sure to get hardened ones. The comp cams black ones are good and pretty cheap. Don't have a part #.

I know powerhouse makes a tool to probably drill and tap the studs, check with them.http://www.powerhouseproducts.com/

 

Brad,

Several manufacturers offer a tool made to cut valve guides. It has a pilot shaft and CAN be used in a heavy duty ½" electric drill, but it had better be a heavy duty drill so it doesn't bog down and break the cutter (like a Milwaukee Hole Hawg or similar reduction gear drill). They are better used in a drill press or vertical mill.

There are also tools available to cut rocker stud bosses, valve spring seats, and combinations that do several steps at once. like spring seats and giudes. Select the correct pilot (arbor) and have at it. Many of these are offered by Crane Cams:

http://64.90.9.168/cranecams/pdf/10g.pdf

 

don't buy the tool to do it your self, it doesn't work very good and for what it cost you can pay someone to mill them for you

 

Like this:

 

the one i bought, for 100 dollars is made by manely, i think. not made quite the same but very similar. mine had 3 or 4 carbide cutters braved to the tool body and uses interchangeable arbors for differant size valve guides. power is from a drill press or hand drill. the big problems with mine is there is no way of knowing how much you've removed, other than making a mark and cutting to it ,not very accurate or repetable from guide to guide and it chatters and bounces a lot. maybe crane, lunati or someone else makes a better one but mine doesn't work. only reason i bought it was to keep from asking my cousin if i could use his mill since i don't have one, yet. anymore i just ask him if i can use his mill and it all works out pretty good for me.

 

I also read somewhere that I had to machine down where the screw in studs go to the thickness of the guide and jam nut.
I knew I should have bought a mill. Guess I will be going to the machine shop. Thanks for the help.

Brad...