How to Make a Big Block K-frame

I have been reading a couple of threads about different ways of putting a big block into an A-body; by either modifying a small block K-frame into a big block K-frame or with the Schumacher mounts. Looks like it can be done either way, but modifying a small block K-frame is the cheaper way to go.

Is there any threads or pictures of how to modify the K-frame?

Yes,
I just did one for my build...
I found the measurements on bigblockdart.com. There was a thread on there that give measurements and photos of how to cut the mounts and move the rearward. I am talking about the "spool" type smallblock k-frame. Then it gave the part numbers for the left and right motormounts. I think mine are from a C-body.

Don't quote me but I think the left side is cut and moved rearward 13/16ths and the right one is cut and moved rearward 1 1/16ths. Just like the Direct-Connection K-frames.