Hot Rods GM BBC Blue Bird Castings

Anyone ever heard of a "Blue Bird" casting BBC 427 Tall Deck? Suppose to be the precursor to the Bow Tie block, but I can't find any info on it.

 

Aluminum or cast iron???...

 

You mean the tall deck 427 used in school buses for years? They got a special block? never heard that one before

 

Mark IV engines saw extensive application in Chevrolet and GMC medium duty trucks, as well as in Blue Bird Corporation's All American and TC/2000transit buses (the latter up until 1995, using a 427 with purpose-built carburetor).

https://en.wikipedia.org/wiki/Chevrolet_big-block_engine

 

More old wives tales...it's nothing more than the same 427 tall deck block used in any medium and large duty trucks.....it's not any thicker or stronger in any area like a Bowtie block is.

It's like the game "Telephone", where one person whispers something to the next person, and then they pass it to the next, and the next, and so on around the circle....and by the time it gets to the 10th person the message is nothing like the original.
Someone somewhere told a buddy "the 427TD block, such as is found in grain trucks or even Blue Bird school buses, is a decent block to build a stroker engine from, the only thing better would be a Bowtie block" and by the time this got repeated to the 10th person it had become "the special "Blue Bird" block is just like the Bowtie block, they based the Bowtie off the Blue Bird".

Just like the Small Block "high nickel" "10" and "20" casting numbers on the end of the block denoting stronger blocks....just a myth, an old wives tale, ….all those are is sand core ID numbers for the foundry workers info.....has nothing to do with the metallurgical content of the iron used.