Is it safe to use the driveshaft from a slant 6 904, on a v8 360 904?

moog, precision, neapco/brute force/lakewood, napa, autozone, riellys, bickel, fed-mogul and there associates and a few more...

Only good choices are rockwell-meritor and spicer, of which spicer has a plant they shifted the crosses to in china on some series, but its there plant...heat treating, caps and needles are all done here.
They aren't using the china copy plants all the others are