Z28 motormount?

[68z302]

The 302 in my Camaro had the interlock motormounts on the block when I pulled the engine. I believe these were replacements after a factory recall?
In the trunk was another used motormount (only 1 [img]/ubbthreads/images/graemlins/frown.gif[/img]). It was quite large and not the interlock style.
I have a set of early Camaro small block engine mounts without interlock but they are much smaller than this one.
I'm thinking that it may be one of the original ones.
There is a GM part number on it & was wondering if someone with a parts book would look it up.
The number on the mount is 38864661 with another number right beside that of 1-14 (date?)
Thanks for any help! [img]/ubbthreads/images/graemlins/biggthumpup.gif[/img]
Rob [img]/ubbthreads/images/graemlins/beers.gif[/img]