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What the diff btw OBS and SD blocks?

1636 Views 4 Replies 2 Participants Last post by  gregrob
Let's say I had an OBS block sitting around to start a build. What are the differences in my block and it?
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ok, what would I need to run it in my SD?

I'll have complete takeout motor for all the "longblock" stuff. Do I need to change the oil pan, pickup, etc?

thanks Tom
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