MT to WordPress and Google

/%year%/%monthnum%/%day%/%postname%/

In your options/permalinks section “structure” field.

Try adding this one to what you’ve already got:
RewriteRule ^([0-9]{4})/?([0-9]{1,2})?/?([0-9]{1,2})?/?([_0-9a-z-]+)?/?([0-9]+)?/?$ /index.php?year=$1&monthnum=$2&name=$4&page=$5 [QSA]

(All you’re doing here is including a regex for the day field, but then ignoring it and going straight to $4 for the name. Functionally equivalent to *not* having it and using $3 for the name.)

– iJames
https://www.invisiblejames.com

Thank you very much, however I’m not sure how to deal with dash(in new structure) and underscore(in old structure), thats the main issue I’m attempting to resolve.

https://blog.carthik.net/vault/2004/05/14/movabletype-to-wordpress/

might provide a few leads.

I’d like to thank everyone for their help!

This plugin got the job done

https://idly.org/2004/05/13/fixing-mt-urls-for-wp

Actually I just plugged it into my-hacks.php instead.

Cheers