Standard pre ecm distributor fits stock location in rear of manifold. For a swap to carb ( highly recommend this route) you will need an Edelbrock #7116 for a 4 barrel plus you'll need a low pressure pump-some of those blocks had fuel pump boss , but may or not have been drilled out for fuel pump push rod and mounting bolts so you may need an electric pump (low pressure and don't get carried away with ######'s GPM specs.

Alan Grove is probably best source for mounting brackets and pulleys but also look at Gearhead Enterpizes,Inc ( Alan may be involved) ebay site -couple of ebay numbers to look at-----361312792455 pulley set and 270915573958 PS bracket- Alan grove # 206l and 109r brackets for ideas---