Hot Rods Identify these SBC Heads

I've been trying to find out what these heads are, I've looked through all SBC threads and came up empty,
anyone know what they are?

And this one,

Help is appreciated.

 

The markings resemble the ones on my '68 2bbl motor.

 

What is the casting number under the valve cover?

 

Thanks PnB, I just thought they were mismatched odd balls, never seen them on the same motor, anyone else?

 

I didn't get a chance to pull the covers, they are on a 350 that belongs to a friend. I'll have to get back over there soon and try to see.

 

Just looked in my sbc id guide. Full of part numbers and info. Had some images to id heads by, but nothing that matched what you are showing. Casting numbers will tell all.

 

Casting Numbers???????????????????????

 

what year did they start putting bolt holes in sbc heads.my 327 heads dont have them???

 

...... In '68

 

Once you get the casting #'s, check with this site to get an idea what they came on..
http://webpages.charter.net/darrell1/casting_numbers.html

 

#3767754 – 1959-1961 on 283 Cubic Inch engines. Called the “Power Pack” cylinder heads. 1.72˝ intake valves and 1.50˝ exhaust valves. 60cc Combustion Chambers.
#3774692 – 1958-1964 on 283 Cubic Inch engines. Called the “Power Pack” cylinder heads. 1.72˝ intake valves and 1.50˝ exhaust valves. 60cc Combustion Chambers.
#3795896 – 1963-1965 on 283 Cubic Inch engines. Called the “Power Pack” cylinder heads. 1.72˝ intake valves and 1.50˝ exhaust valves. 60cc Combustion Chambers.
#3782461 – 1964-1966 on 327 Cubic Inch engines. 161/62 cc port volumes, 62cc combustion chamber. Identified by Double Camel hump symbol.
#3782461X – 1960-1963 on 283 and 327 Cubic Inch engines. 172/64 cc port volumes, 62cc combustion chamber. Identified by Double Camel hump symbol.
#3890462 – 1966-1967 on 302, 327, and 350 Cubic Inch engines. 64cc combustion chamber. Identified by Camel hump symbol. No accessory mounting holes.
#3917291 – 1967-1968 on 302, 327, and 350 Cubic Inch engines. 64cc combustion chamber. Identified by Camel hump symbol.
#3932441 – 1969-1970 on 350 Cubic Inch engines. 161-165cc intake port. 76cc combustion chamber.
#3932441X – 1969-1970 on 350 and 400 Cubic Inch engines. 161/65cc ports. 80cc combustion chamber. 1.94″ intake/1.5″ exhaust valves.
#333881 – 1974-1975 on 350 Cubic Inch engines. 76cc combustion chamber. 2.02″ intake/1.6″ Exhaust valves.
#3991492 – 1970 on 350 Cubic Inch engines. Available on the LT1 engine and over the counter. 64cc combustion chamber. Either straight or angled plugs.

 

Thanks Stumpy, I found this about the same time you posted it,
Thanks all.