Any help welcomed (alien modifications?)

[bigeasy1]

Damm i have no idea what they could be,do you have any other photos?,maybe larger pics.would help us see the details better.

[Dave Hirshberg]

My best guess is that someone attempted their own steel motor mount. The round things with the bolts in them look like fluid filled in hull transducer mounts. Someone went thru a whole lotta trouble to make those. Grind them out, I doub't they are useable anymore.