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More SBC heads ready to go 981's
by DEMONSPEED on December 24th 2009, 12:24 pm
I have a set of 1668668 gm heads for sale. The man I bought them from said they have fairly new valves, valve springs, and what not. I'm not sure what size valves they have. They are not centerbolt. Heads are ready to bolt to a motor. $50 cash 1 859 391 9224 Rob
DEMONSPEED- Scrounger
- Number of posts: 408
Registration date: 2009-05-30
Age: 17
Location: In the woods 
Re: More SBC heads ready to go 981's
by DEMONSPEED on January 18th 2010, 11:24 am
I feel really stupid about this but..... I couldn't find any info on these heads and I found out why today. I was reading the number upside down hahaha. The casting number is 3998991 heads. The valves are 1.82, 1.60's. Made from 1972-1973 and came on either the 307 or 350. 75cc combustion chambers.
DEMONSPEED- Scrounger
- Number of posts: 408
Registration date: 2009-05-30
Age: 17
Location: In the woods -
Re: More SBC heads ready to go 981's
by DEMONSPEED on January 18th 2010, 11:47 am
My caliper was messing up they are 1.72/1.50's
DEMONSPEED- Scrounger
- Number of posts: 408
Registration date: 2009-05-30
Age: 17
Location: In the woods -
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