'141 is a 96 block with the 3/8" cooling lines. Has the boss in the back of the block that is just like a Hummer/Gvan turbo engine, but nothing is drilled or tapped (yet).

Have one identical to it sitting wrapped up.

Just like a '599 or a '929, just another year, but with the '97+ capabilities as far as rear mounted turbo.

I'd wager a bet that this block was also used in Hummers that used the turbo starting in '96, but w/o the piston oil spray coolers.

J