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

Some info I filed away, probably from www. slantsix.org site.
Your block is a 225 cu in and I read the last table as meaning a 1965. On the passenger side are there 3 staggered core plugs (early) or 5 in a row (later, for sure 1970's)?
Congrats you have the desirable "Super Six" 2 bbl intake, which I think started w/ Aspen/Volare and 80's trucks.
Note the crank PN's if you get that deep into it.