Hot Rods Old Nicson Engine Mount for What?? Please Help

Hey Guys,
I have an old Nicson Engine Mount here and I'm not sure what engine it fits, I was told it was for Early Chrysler but not really sure. Part No. is 300-7 here are some pics any help would be appreciated.

 

This is a Nicson Early Hemi

 

sure looks like early Olds

 

Yes, not Hemi for sure, thanks for the pic. Wish someone had an old Catalog. Thanks

 

google images of 303 and 324 olds blocks, timing covers, etc. you'll see what I mean.

 

Is this for a boat? Lippy

 

pretty much....

 

Yep, you are correct Squirrel, that's def. it!!
Thanks Man, I appreciate the info.