4.3 to 5.7 vortec
 

hey guys im having a few issues on figuring outt his swap i have a 96 4.3 vortec 5 speed truck thats knocking i want to move up to a 5.7l vortec

my questions are

can i use the existing motor mounts?

will the harness interchange?

do i need a 5.7 computer?

will the y pipe bolt up?

can i use the 4.3 flywheel?

and what year engines will work?

any answers will be greatly appreciated thanks