Yes thats correct, my engine does not have the stock manifold on it so Ive just measured across the block at the sump area.
The X flow is very similar to the pre crossflow in most respects, it will certianly fit wherever the early engine fitted.
Bear in mind that the Aussie bellhousing are NOT like your small bell or large bell blocks, but somewhere in between, mounts are the same weight is about the same, the alloy head crossflow is lighter than the earlier precrossflow, not so for iron heads, but you would bother with one anyway.
Like Ive said Ive put mine in the 1965 falcon ute in Aussie, with the problems ive outlined.
Hope this helps
A7M