Hey 57Rat,
I think they said your date code is year 1956. And engines made late in the year (1956) were usually put in the next year (1957) vehicles.
Date Code:
I286 is
Letter I(9) = September
28 = day
6 = 1956
Try to get that other casting number on the block. It's over there by the starter, near the same area as your CON4 number.
Under all that greasey oil dirt stuff should be something like 3837004 or 3836233. Gotta watch those 3's & 8's they like to hold the dirt.
