2 of my friends have engines with these heads on them. We didn't want to pull the covers to get the casting #.

Does anyone know what they are? They have casting marks that look like regular camel hump heads but the humps are only about a 1/4" high.

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ericj205@nastyz28.com
'71 RS/SS w/ vortec heads in progress
'65 Chevelle
'95 Formula

Are these the 69 & later accessory hole heads?

If they are, Chevy kept the markings when they switched to accessory hole heads for a couple of years, but they made them smaller to accomodate the accessory mounting boss.

The mini-camelback castings should be functionally equivalent to the older style without accessory holes.

Camel Hump Heads can be deceiving. Everyone automatically assumes that they are 2.02 Heads which indeed that is not true. They also came in 1.94's as well. The only way to tell exactly what they are is to pull the valve cover off and get access to the casting number. But then again the same casting number may of been applied to 2.02 and 1.94 so you would need to actually pull the head and measure the Intake Valve to accurately determine the correct head.

Bob R

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1973 Z28 Original Owner 6 Year Frame Off Restoration
1971 RS Z28 Frame Off Restoration in Progress
http://www.geocities.com/bobr73z28

Once again Bob is correct. Another thing, some Hi Po heads (2.02/ 1.60 valves) had screw-in-studs and guideplates from the factory. Obviously, this can be seen by taking off the vavle cover. Three casting numbers come to mind, 492, 291, 186. I'm sure there are more.

[This message has been edited by mulsane71z (edited October 11, 2001).]

yes they have accessory holes, what about combustion chamber size?

Most are 64cc.

Well he had to pull a valve cover, they were casting # 4014416, 80-86 305 1.84"/1.5" valves, 58cc chambers

Not "baby" camel hump heads then...