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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 77 head

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01-13-2013 15:06:19

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30.5, I can't tell you the size, but they are quite a bit bigger and will go right in, just grind the seats to fit and port the head. did mine 30+ years ago without changing the seats and never had a problem. good luck, Chuck PS, there are bumps in either the exhaust or intake ports,, can't remember which, just polish them, if you grind to much on them you will hit water

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01-13-2013 15:44:10

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 Re: 77 head in reply to chucksoliver77, 01-13-2013 15:06:19  
for a 320 inch 77 would a 770 head be better or should I spend the money that a 770 head would cost me on flow work instead and use the 77 head?

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01-14-2013 07:46:08

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 Re: 77 head in reply to dboll, 01-13-2013 15:44:10  
I run a 770 head with ford 289 valves on a 421.

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01-14-2013 16:50:55

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 Re: 77 head in reply to Bryce, 01-14-2013 07:46:08  
how close to the Oliver valves in length to the Ford valves?

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01-15-2013 10:02:26

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 Re: 77 head in reply to dboll, 01-14-2013 16:50:55  
Real close,rockers bolt right on no problems.

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01-15-2013 17:11:12

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 Re: 77 head in reply to Bryce, 01-15-2013 10:02:26  
something to think about, pretty sure they'd be cheaper than Oliver valves

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