Hey Jim,
I just got done attaching the CPP engine mounts on the frame of my '52 3100.
I measured from the center of the front cab support bolt hole, to the center of the hole in the CPP mount. It is 31 inches.
The center-to-center measurement between the two CPP mounts is 19 inches. (That 19" is what CPP calls for in their instructions.)
These specs should put your small block right where you need it regardless of what series truck you have.
Carl
