402 block numbers

[Mr70]

Check on Team Chevelle.I thought someone said they found a company who reproduces this Buick interior.But I may be mistaken.It was awhile ago.

There is a 4Spd Black Cherry 1970 L78 Chevelle over here that has the #290 block in it.It is a CE engine,and is dated 1972.The owner claims he bought it with that engine in it in 1978.He called the early owners and realized it was put in the car in 1972,as a Warranty engine.His is a #290 two bolt,to replace the original 4 bolt L78.
I have never seen this block as a 4 bolt block,Have any of you?