3731554 57-62 283 heads http://www.mortec.com/castnum.htm

1986-57 3731394 283 8 al WCFB Y/225hp, 2nd design http://www.nastyz28.com/sbcmenu.html

for the block...not as sure on this, but found
1957 F 283 Powerglide - 2 cars & Vette to refer to the first character (F) http://www.nastyz28.com/sbchevy/spcode5.html

if we try the RF at the end we get
1962 RF 327 manual trans. 360 FI Vette
http://www.nastyz28.com/sbchevy/spcode6.html

The GM 0-193457 - partial VIN number??

Anyone else got some thoughts?