48 is a weird year for distributors as there is a early and late distributor. The early 48 is Delco 1110090. That distributor takes a d110 point set, d203 condenser, d301 cap and d400 rotor. The late 48 distributor is 1112353 and uses a d110p point set, and the same condenser, cap and rotor as the early unit.
In the March 1973 Delco popular parts catelog, Delco lists the later 1112403 distributor as a replacement for the 090 and 353 distributor. So d105p for points, d230 condenser, d306 cap, d405 rotor.
