I am swapping an engine from a 85sd, to an 83.
I have it out, and would like your opinion...

Wht engine has 250-300K on it. I was thinking about droping the pistons out the bottom, and re-ringing, and replacing the bearings before installing it into the 83. It does have some blow buy, but not real bad.
What would you do?
Why?

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83 300SD Dark Silver Dark brown inside