LA TBI does indeed have provisions for a fuel pump. Eccentric on the cam and a bolt-on block off plate. Not that the provision is in the block anyway, it's in the timing cover; casting #3769996, the same one used from 1979 to 1990 and the end of the 360 TBI motors. It really is as simple as pulling the block-off plate and installing a mechanical pump.

Your phrasing is misleading - you are trying to score points on a technicality because FuryBoy used the word block instead of engine. Please use words instead of obscure abbreviations like otoh. There is already enough misinformation/confusion out there on the last of the LAs.