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Old 06-17-2018, 06:35 AM
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Reasonably priced tall SBC Valve Covers

I need tall valve covers to clear roller rockers on Blueprint sBC aluminum heads. Heads allow installation of either perimeter or center bolt covers. Spacers seem to cost as much as valve covers, so I may as well buy new covers.

Any recommendations on brands that have one hole in each cover for pcv and breather, and that fit and seal well? I would like to find them priced no more than $90-$110 range, if possible.

Bruce

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Old 06-17-2018, 07:01 AM
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Unless you have Cylinder Head Stud Girdles

Perimeter bolt covers valve covers will work .... I have never noticed if the center bolt covers had a lower profile.

Now I'm curious, have a 327 with vortex heads, in a 32 HotRod truck..... looking for my tape measure ....

pep
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Old 06-17-2018, 07:15 AM
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I just did a 377 dart shp build and below are the valve covers I am using and I am running comp cam ultra pro magnum roller rocker arms which are pretty fat and big and fit under my tall valve covers no problem. The baffles that they come with work very well as well keeping the pcv from sucking up oil etc.

They cost a little more then steel covers but they have worked for me on several builds over the years even ones with stud girdles.


https://www.summitracing.com/parts/sum-g3302/overview/

Last edited by eric32; 06-17-2018 at 07:22 AM.
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Old 06-17-2018, 01:53 PM
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Another option is a set of low profile lock nuts. I used a set of these with rollers rockers and kept my stock profile valve covers:

https://www.summitracing.com/parts/cro-86051s-16

I went that way because the tall valve covers hit my heater motor.
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Old 06-17-2018, 03:31 PM
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Those Summit aluminum covers look like a good buy for the money. Most of other aluminum tall covers are about $100-130.

Since my truck engine compartment is so big, I can't see anywhere that the taller covers will be a problem.

Bruce
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Old 06-17-2018, 04:28 PM
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The valve cover clearance is another reason some people who have SB Chevrolet engines must use a GM camshaft which will allow the use of GM valve springs and pressed-in rocker studs. I am one of those guys.

Pressed in studs should not be used with valve springs with more than 110 lb seat and 280 lb open pressure and that limits the use to stock replacement valve springs and the use of a flat tappet camshaft with no more than .500” valve lift. The old tried and true Z-28 valve springs (GM 3911068) are still available under the original part number and the L-79 camshaft (GM 3863151) with .447” valve lift was discontinued in 2005 but replicas are available from most cam grinders. The Z-28 valve springs will have 80 lb seat and 200 lb open pressure with a replica of the “151” camshaft. Unlike aftermarket racing Cams, the GM replicas have slow valve acceleration ramps and will have less wear on the valve train. No more flat Cam lobes when using bone crushing valve spring pressure.

Chevrolet cast iron heads, Z-28 valve springs, GM 3863151 camshaft:
Seat pressure: 80 lb @ 1.700”
Open pressure: 200 lb @ 1.253”
Coil bind: 1.150”

GM 3863151 (discontinued 2005) L-79 replica camshafts:
.447” valve lift
222 deg duration @ .050”.

Comp Cams 12-106-3
Speed Pro CS179R
Elgin E903P

Camshaft range is between 2500 RPM an 5700 RPM with the L-79 cam and Z-28 valve springs. Best used in a 327 CI engine with 10.00:1 to 11.0:1 compression ratio and 3.70:1 or 4.11:1 rear gears.

Last edited by MouseFink; 06-17-2018 at 04:45 PM.
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Old 06-18-2018, 11:30 AM
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BTW.....Here some more useless information.

Stock 1955-1967 Chevrolet V8 valve covers are LH and RH. The 327 valve cover looks exactly the same if they don’t have a decal on them but they are LH and RH. If they are placed on the wrong side, the stock rocker arm can hit the valve cover with more than .450” valve lift.

Corvette and 265/283 passenger car valve covers have “Corvette” and “Chevrolet” embossed script to indicate which side they go on. However 1962-1967 valve covers on the 327 engines do not have any script and must be treated differently. The factory stamped a small “C” near the inside / rear screw hole of 327 valve covers to indicate which side they go on and how they are oriented on the head. The “C” was stamped on the valve covers after the engine was assembled but before it was painted.

The LH 327 valve cover has two temperature sender wire clips but the RH valve cover has none and can easily be installed backwards if there is no decal on it. Then the rocker arms can hit the valve cover. The “327” decal was put on the 1962-1967 valve covers after the engine was assembled and painted.
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Old 06-19-2018, 06:00 AM
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Edelbrock tall chrome valve covers

Way back in ‘14 I bought Edelbrock covers at Pep Boys. They were about $50 and I got something off that, net around $40 or so. I bought Moroso spreaders also. I run Felpro silicone gaskets $$$ because I tend to remove covers often. They worth the $$$ if u do what I do. Later bought Dart covers just because they don’t say Edelbrock.
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