Be sure you get the whole computer package with that vortec- - - -electric in-tank fuel pump, computer, wiring harness, all the sensors, etc. My wife's Buick Rainier runs a 4200, and it's a good engine, but swapping it into a stovebolt would be a real adventure!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!