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double hump heads-screw in stud advice

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double hump heads-screw in stud advice

Postby Rooster on Fri Mar 19, 2010 9:01 pm

Well I got my heads back from the machine shop today.They are 462 castings,2.02/1.60 stainless valves,bronze? guides,surfaced, .500 lift springs,59cc comb.chambers. They are tapped for 3/8 screw in studs.CR is 10.4:1. They were bare castings when I took them in,so my mach. shop guy went all the way through them,except studs and guide plates, as i was already looking at divorce if I spent 1 more cent,LOl What studs should I use? It's basically going on a street/performance application,350 4-bolt SBC .30 over w/dished pistons,pretty much stock short block. The cam is a Melling C-400-P Hyd. .447 lift/222 dur.Just wondering if I need to use guideplates also.I'm thinking ARP studs,probably stock size,don't really know.Anyone have a part number,that would be greatly appreciated.
86 Cutlass Supreme
GMPP 350/290 Crate engine
TH350 Trans
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Re: double hump heads-screw in stud advice

Postby 86Cutlass383SR on Mon Mar 22, 2010 2:06 am

Chevy rocker studs are made in both 3/8 and 7/16. Both use the same 3/8 hole in the head.

With a cam that size, I'd just use the stock sized 3/8 studs. If you might be looking at upgrading the cam sometime in the future and need new rocker arms anyway, then it'd be cheaper to just install the 7/16 studs and rockers now. The 7/16 will be more stable with stiffer springs and more lift.

Sorry, I don't have a part number for ya but you could probably call Summit or whoever you're buying them from and they could tell you the correct numbers.
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