Help! Need some numbers help on a car I am looking

[Mark_C]

Block should be a 618 casting, probably cast 2 or 3 days before assembly. Cars too late for a 388 casting, and to early for an 010 casting. Muncie case will have an A suffix, since you couldn't get an M21 or M22 transmission in an L48 car. The axle seems to be dated to early for the car (doesn't mean its not the original though) but everything else seems to be correctly dated for a late March built car. Need to see the stamps to see if they are original though.