GM Straight 6 engine casting number help

I have scoured the inliner's web site, Hemming's and here and still can't find a match for the numbers on a straight 6.
So I'm asking for help here.

I had always been told the engine in this car was a 235. After seeing some codes I am leaning toward's it being a 216.

The number right behind the distributor reads: B F 8 I 8 9 4 8 9

The number on the lower portion of the block (below the oil breather tube) reads:

GM
839770
14
42

Anyone have any input?

Thanks,
N8

 

Yes, it appears its a 216 with the 839770 casting.

http://www.adchevy.com/tools/castinglookup/?castingnumber=839770&submit=Lookup#


The stamping behind the distributor is BF, which indicates a 1948 3100 series truck engine from what I found. Others may chime in with more info.

http://chevy.oldcarmanualproject.com/models/engine.htm