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01-24-2004, 02:52 AM
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#1 |
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Registered User
Join Date: Jan 2003
Location: Snead, Alabama
Posts: 399
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BB Heads < need info
I have 3 numbers
1408045 346236 1409236 What are considered to be the best oval port heads to build, what are the above casting numbers worth, Thanks for the input.
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Jock, Powder blasting shop, Alabama Last edited by jacquesdean; 01-24-2004 at 02:58 AM. |
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01-24-2004, 03:19 AM
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#2 |
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Recovering 67-72 Addict
 
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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Best oval port heads are the 049's and the 781's. I am not familiar with the ones that you posted.
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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01-24-2004, 06:59 AM
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#3 |
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Can't kick the addiction!
Join Date: Jan 2002
Location: Riverton, CT 06065
Posts: 402
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Breeh is right, 049's & 781's are the best stock oval port open chamber heads to build for a street or street/strip application. If you find a set of either head you will want to send it to the machine shop to be machine for larger valves, 2.25 intake and 1.90 exhaust. The larger valves combined with some port & polishing will make those heads some of the best cast iron heads you can get. Right now I'm on the porting & polishing stage with the 781's that I have.
The casting numbers you have: 1408045: did not find. 14081045: 78-87 454 open chamber oval ports (generic head, not high preformance) 346236: 75-87 454 open chamber oval port (non-preformance "peanut" port, good for low hp high torque) 1409236: did not find 14092360: 86-88 454 truck open chamber oval port (generic head) Hope this helps... |
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01-24-2004, 07:47 AM
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#4 |
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I need another Barley Pop
Join Date: Feb 2001
Location: Grants Pass, OR
Posts: 1,629
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How about some closed chamber oval ports? Can they be made to run?
Casting number: 3872702 Sorry for high-jacking the thread....... Rob
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67 Short Fleet 4x4 04 Honda CRF450R 89 Toyota 4-Runner 34 Ford 2 door sedan - Long term project ---------------------------------------------- There is a very fine line between "hobby" and "mental illness" 
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01-24-2004, 01:50 PM
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#5 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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According to Morton, the 3872702 heads are 65-66 oval port, closed chamber heads for 396,427 with 98 cc chambers. I think that they are a decent enough head but they are no where close to the aluminum aftermarket heads that are available nowdays.
The seats should be changed to hardened seats and with a little work they will work well. If done right you will spend some big bucks on them, though. The high performance heads in those years were the rectangular heads. Here is a link to Morton. Jim http://www.mortec.com/bbc.htm |
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