They are the same.
In the late month of 1999 Chevy completely REDESIGNED ALL the engines and transmissions. SO the 2000 4.3L engine will not bolt up to the frame of the 97 truck or even bolt up to the transmission in the 97.
I don't know where you got your information for the above statement but that is completely incorrect. the 97 and 00 4.3 are 100 percent interchangeable. same bolt pattern at the frame mounts and the bell housing. you must be thinking of the change from the 95-96 version. they still have the same bolt pattern but run comparable but different fuel systems as well as different heads and cam. the engine mounts and bell housing pattern is still exactly the same. the 4.3 and v8 shared the same pattern even into the LS series.
2000 minus 43 can be calculated as follows: 2000 - 43 = 1957 Therefore, 2000 minus 43 is equal to 1957.
Where is the oil sending unit located on the 2001 Chevy 43. vortec engine?
43 thousands of an inch
Extreme Dinosaurs - 1997 Salsified 1-43 was released on: USA: 1997
Sunset Beach - 1997 1-43 was released on: USA: 6 March 1997
41 to 47 psi
Owners manual, positive.
The Atheist Experience - 1997 1-43 was released on: USA: 9 August 1998
Power Rangers Turbo - 1997 Parts and Parcel 1-43 was released on: USA: 18 November 1997
Luna salvaje - 2000 1-43 is rated/received certificates of: Argentina:Atp
(-43)2 = 1,849(same as +43 squared)
Teletubbies - 1997 Arthur Robot Story 1-43 is rated/received certificates of: Australia:G