the 3970010 block in 1969 u could get it 2 bolt or 4 bolt and was used for 302,327 and 350s and some 4 bolt 327 where made.

but look on the back right of the block and u should see a block number.that has a small rod journal crank in it.so it uses 2.00 main instead of 2.10

how much do u want for it.i got racing stuff that we can maybe trade for it or cash