sb heads

[grunt11b40x]

does anyone have the specs. for a sb head # 3970126 ?
thanks. /forums/images/graemlins/1zhelp.gif

 

[ben427]

Used from 67-71 on 327/350's

 

[grunt11b40x]

thanks ben, I take it that they are just standard heads. This guy want to sell them to me claiming them as high performance heads. he wants 250 for the pair what do you think? are they 64cc heads?

 

[88Silverado]

Those heads are 75cc
1.72/1.50 Valves
1967-79 327-350
148.3 intake cfm, 87.9 ex cfm


Nothing special, standard stock heads

 

[BigBurban350]

[ QUOTE ]
Those heads are 75cc
1.72/1.50 Valves
1967-79 327-350
148.3 intake cfm, 87.9 ex cfm


Nothing special, standard stock heads

[/ QUOTE ]

Dont buy them, those valves are really tiny, you can fit up to 2.08 intake on a 350.

 

[88Silverado]

I cant believe the guy wants $250 for them /forums/images/graemlins/eek.gif
$50 maybe. I bought a set of 186 (64cc) camel humps with ported exhaust for $50 then cost me another $150 to rebuild. Most performance GM castings can be found for around $200. I have a decent list of GM performance castings if you like it /forums/images/graemlins/thumb.gif

 

[grunt11b40x]

Thanks for the info I knew something just was not right about those heads. I would love to get my hands on that list you have.

 

[Thunder]

Casting numbers:http://www.mortec.com/castnum.htm
You might also try browsing the CK5 link list at the head of the 73-91 K5 forum lotsa good links there.

 

[88Silverado]

Heres some links you can look at with SB head info /forums/images/graemlins/thumb.gif

http://www.chevytalk.com/tech/engine/SBC_Heads.html

http://www.topher.net/~bearman/gmheadcomp.html

http://www.geocities.com/MotorCity/Speedway/5117/flow/

http://www.jimsperformance.com/headchart.html