'68 thru '70 170 blocks...5 core holes?

My hope/goal is to obtain and inspect one if they exist,and use if the casting
is superior to the older ones.My fear is that the engineers were already planning the 198,and
saw no need to cast the LGFC w/the improvements.Possibly the shorter LG was considered
rigid enough by design,so it was unnecessary,and the faster de-core time not worth it for an
eng. about to be disco'd. Charrlie_S mite have the market cornered on those things,lets see
what he finds, and anyone else who mite know of one... :coffee2: