I have a 396 motor with the following:
Cast# 3935440, ...cast date of "G 1 8". (does have "Hi Perf Pass" cast near oil filter mount and behind timing cover)
Front pad stamped "T0715EF", ...partial VIN "18G136909"
...Heads are cast #3931063 with dates of "F258" and "G108"
I believe this to be from a '68 Chevelle 396/350hp 4sp car (re. 'EF'), ...correct??
Also, ...from what I've checked, ...it appears the heads are very late '68 heads??? (June 25th and July 10th) (ref. By the Numbers book, P. 103)
Thanks in advance for any information/confirmation.....