64-66 manifold questions

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jcab

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there was only one casting number for these manifolds, which were:
1739599 (right)
2465857 (left)
correct?

secondly, do these manifolds fit all small blocks, or just the 273?

I have only ever worked on a 318, so I know nothing about the other small blocks.

thanks
 
They should fit 273and 318s but the ports will be to small for 340-360 heads.
 
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