Quoting G:
Never revised for the galant. Just new designs for new motors. Like evo and 3g eclipse.
Guess what? If you look up a lifter in CAPS for the E39 Galant, it supercedes to the Evo p/n, MD377054. Hmmm, revised or improved design for the Galant. Fancy that.
BTW, "3g" lifters (4G63 type and size) do not refer to the 3g Eclipse, and don't even fit either engine available in that car (no DOHC design).