will 1989 350 swap into 2000 350. 1989 is a chevy Scottsdale 1/2 ton and the 2000 is a Tahoe Z71

There is always a way to do this but requires changing the computer, wiring harness and such, a lot more little things, if you switched just the blocks, you would have to put the vortec heads & intake set-up on the older block, have to buy a different cam, lifters, and pushrods to make it work. It would be more feasible to just find another Vortec to put in.

heads are warped and valves are burnt in the vortec. TBI engine has less miles and new trans. is switching electronics feasible or worth it.

Yea, it would be since you have the trany also, because the ecm controls trany functions also. So you just take out the ecm (computer) & wire harness, and switch them, but that is a big project as it runs fuel pump also. You would need to have the 1989 ecm out of a truck to run that motor set-up. The computer in the 2000 is a ObdII ecm, which started in 1996, it will not run the 1989 motor the way it is set up. Unless you have one, I have seen ecm's on e-bay. Long as you got time and patients, & go threw some frustration, Yea...

Was just thinking, since that is an older set-up, you could eliminate the ecm & put a carbureted 4-barrle on it. Also you really can do this if you live in a state that requires emissions test on your vehicle, because they would go by 2000 yr. standards. Not the 1989 yr.

Thinking on this more... you would probably would be better off finding a Vortec motor for the Tahoe, I live in a state were it doesn't matter, and I like to modify things.