[Scrapla]

I was looking at the block goin into my car and it had XXX stamped on it does anyone know what this means or stands for, also Im gonna be transfering some parts over and wanted to know a good fuel set up for the 347. On my list are the 255in tank fuel pump,and 24#ers but will stock fuel rails be fine, im gonna be spraying a 100-150shot on this motor and want to take care of any problems before its complete.