can a engine long block from a 2007 chevy tahoe fit a 1999 chevy K 3500

can a engine long block from a tahoe 2007 lt be swamp to a 1999 chevy k3500 pickup truck

Those are two completely different engines. The Tahoe Long block bolt up to the transmission with modifications. Best bet if you have the Vortec 5.7 is to stick with that year which is 96-99 and they ran them in Tahoes, Suburbans, Vans, and Trucks. If you would have a complete engine and drivetrain from the 07 tahoe you could swap it in. But that much modification would be pointless unless your building a custom truck and want to spend a decent amount of money.