bbc heads cast# 886781
Thread Starter
Instructor
Joined: Apr 2004
Posts: 233
Likes: 0
From: greenville sc
bbc heads cast# 886781
Can someone tell me if $125.00 is a good price to pay for a set of BBC casting # 336781 complete heads. They are for sale locally. This guy said he had them on his 454 and had recently replaced the bottom end. he said he ran the engine hot within 6 miles of replacing the bottom end and spun a bearing. The engine is torn down now and he is selling everything. What is the chance that these heads are worped or cracked? Is this a good buy or should I just leave these alone?
Last edited by blackbeauty74; Jul 29, 2009 at 11:43 AM.
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
well here are the specs on those heads
http://www.mortec.com/bbc.htm
73-85
oval port
open chamber
118cc chamber
256/114cc ports
http://www.mortec.com/bbc.htm
73-85
oval port
open chamber
118cc chamber
256/114cc ports
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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Only if they aren't cracked. We recently went through a pile of them to find some that didn't have issues that weren't too bad to mess with. This stuff is getting pretty old and since it ran hot..they are suspect.
But those are good heads if they are in decent shape.
JIM
But those are good heads if they are in decent shape.
JIM
Le Mans Master
Joined: Dec 2006
Posts: 5,557
Likes: 9
From: Oquirrh Mountains
St. Jude Donor '09
Can someone tell me if $125.00 is a good price to pay for a set of BBC casting # 336781 complete heads. They are for sale locally. This guy said he had them on his 454 and had recently replaced the bottom end. he said he ran the engine hot within 6 miles of replacing the bottom end and spun a bearing. The engine is torn down now and he is selling everything. What is the chance that these heads are worped or cracked? Is this a good buy or should I just leave these alone?
www.gamrace.com/bbc%20cast_iron_oval_ports.htm
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Burning Brakes
Joined: Jul 2009
Posts: 1,132
Likes: 14
From: A town SC
781
Its a proven fact, the 781s are the best flowing oval ports that GM produced in the early big blocks. Seen a set on a 496 run 6.50s in the 1/8 mile in a full body 66 velle. with pocket work and port match. not even a full port job.
