1968 ss/rs casting numbers. Block and heads

[Erussell99]

I picked up a 1968 ss/rs Basket cass a few years back.  It's been sitting in the back of the garage now for a too long.  I am slowly pulling all the parts I need together.  The original engine is gone.  It is a 4 speed car with a Muncie and 12 bold rear end.  My plan is to put a 396 in it.  Looking for as close to original as I can find.  It will not be a vin matching block obviously.   She will be groto blue if I go back original.  I'd prefer lemans blue but we will see.  Looking for guidance here.  I believe the block casting number should be 3916323 or 3935440.  What about the heads? 

[cars1234]

 I believe the 2 year warranty was in effect then so if you go with a CE block you can go with
3916323
3935440    
3955272
3969854
maybe several others from 68 to 70 years I just came across a late 69  402/375hp CE motor on Craigslist just another option to think about.