casting# block 2202857-7 & intake 4104595 yr??

Lol, OK, maybe I will do a better job of articulating my query.First I'd like to give
myself a #-o , I forgot they dropped the "170" off the base dart in '67, even tho' the
V100 valiant continued that year.
The question is (and I did post it awhile back),was there a parallel block upgrade
in '68 for the lowdeck "G" casting ,to the 5 core-hole series for the "RG" talldeck one?
Or,did Mopar see the end of the 170 mill coming,and just not bother other than
swapping in the different hubbed crank and calling it a day? So far the 2463230 series
casting w/3 staggered core holes seems to be the latest one, which was around in '64.
:coffee2: