As far as a direct bolt in NO. But if you have the smarts and the know how, you can put anything in there.
A 2000 Chevy Silverado K2500 with 6.0 Vortec engine.
will a 4.3l vortec starter fit a 305 vortec?
Yes.
Yes as long they were mounted on the same side of the engine.
It will as long as the 305 is a VORTEC ENGINE TOO.
YES. That would be a direct swop.
Yes same engine.
NO.
Yes they are the same heads.
The answer to your question is no. 1988 to 1998 interchange.1999 to 2002 interchange.
No because the ports on a tbi head are different than the ports on a vortec head, vortec heads need a vortec intake however you can switch a carburated engine to a tbi engine because the heads are the same
No it will not the 1991 is a TBI and the 1998 is a vortec engine. They have 2 different Fuel Injection systems. You would have to change a whole lot of things to make it work.