340 to 360 swap 68' dart questions

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motor mount brackets should be the same for 340/360, 318/273 use diff driver side.
How is the 360 stroker balanced? if internally same flex plate will work, if externally you'll need a different flex plate.
Check your h2o pump as stated above.
This^^^^. Brackets are the same as 340. Flexplate/convertor depends on how your "stroked 360" was balanced, and rad as noted.