Finally get to pretend I am one of the cool kids - Holley kit swap

Seems like there is some slop. I can look at the /6 k-frame when I get home.

Motor mounts are not slotted.

Worst case I will probably just push the inner fender in a little.
You could shim the motor up just a tad... put a spacer between the block and the mount. You don't need much. Try experimenting with washers. Hopefully it doesn't throw the holes too far apart

I've got all kinds of shims, trying to clear this and that.. Mostly PS.. But I'm on biscuits