I will try to get more numbers later but these are new Unused heads that came off a crate motor and were sent off to be CNC ported. They have CNC stamped on the one end of the heads. #'s off heads are: CNC, 1684, 10241A & 09943. I am trying to locate the flow numbers and other specs such and chamber volume and compression ratio for these heads. This is all the info I have right now.

I am looking at buying a crate motor setup that has these heads on them. I don't have them as of YET. I am 99.9% sure I am going to get this but I won't know for sure until monday and even then it will take a week for this to be shipped to me. The heads were $2400 per the present owner's statement.

I would like to get $1500 for them and they are new and unrun with bigger valves, but again I will need to get better spec listing to be for sure.

This is a gauging interest thread and I would appreciate feedback of people who have good questions and are interested in the heads. Thanks
John
jcook84889@insightbb.com

 

more information guy sent me on heads
I will try to get flow numbers from him
Look to be AFR heads brand new cnc ported

180cc LT1 SBC Street Cylinder Head
The High Swirl & Tumble Velocity Animal
The AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 180cc
intake port LT1 small block Chevy cylinder heads are available in the LT1
angle plug version only. These heads feature a 56cc to 74cc combustion
chamber with a 64cc exhaust port and a 3/4" thick head deck (ideal for
nitrous or blower applications). Standard valves are 2.020 intake and 1.600
exhaust with AFR's hardened ductile iron interlocking valve seats. The
exceptional flow characteristics, ideal operating range of idle to 6000 rpm
(higher rpm ranges possible depending on combination of parts), 23º valve
angle, and standard valve spacing make this the perfect street head for 350
cid to 383 cid engines and is specifically designed for 1992-95 Corvettes
and 1993-97 Camaros. No special parts are required.

Note:
Hydraulic roller cams typically experience valve float at 5800-6000 rpm
because of their fast ramp rates. AFR suggest you upgrade your springs to
AFR part #8032, 1.530 O.D. with higher spring pressures and use our Patented
"Hydra Rev Kit" to reduce chances of valve float associated with rpm 6000 or
higher

Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
70% to 100% CNC Ported Intake Ports
3-angle Valve Job
Intake Valve, 2.020" standard length, AFR #7204
Exhaust Valve, 1.600" standard length, AFR #7219
1.450" OD Hydraulic Dual Valve Spring, 120 lbs. on seat, .550" maximum lift,
AFR #8020
10º 4140 Chrome Moly Retainers, AFR #8506
10º Valve Locks, AFR #9006
3/8" Rocker Studs, AFR #6410
Valve Seals, AFR #6611
Hardened Shims, AFR #6326
Intake Valve Seats, AFR #9060
Exhaust Valve Seats, AFR #9070
Bronze Valve Guides, AFR #9050