[MDPotter]

Originally Posted by racecougar

Those are the ones. Those pair up to the stock type motor mounts and I-6/V8 perches.

It looks like these worked well for you? I have a 68 C15 and I want to reuse the stock perches (look just like yours-see top picture) but it seems like most of the LS motor mount plates are made for the other type of mount which has a thru-bolt (see bottom picture) rather than the bolt through the back of the motor mount like mine (top picture). I'm told that the 3-bolt pattern is different between the two style mounts too. Do you have the style like mine (top picture)?