If I am not mistaking, an '89 would have a 535 trans in it, not an 833OD. I think the last 833 was in '85.

In this case, you could still grab it, but it's going to have a pretty low first gear. it's not even remotly close to the more popular 833 trans, but if you gotta have a stick and its all there, go for it. Also if its a 360, it most likely will have the larger flywheel that needs the corresponding bellhousing to go with it--and will be balanced for a LA 360.

The bellhousing will have the right sized hole in it, but will not have the 833 pattern on it--just so you know for future reference. Supposidly someone said that some of the early bellhousings did have both patterns (435/535 and 833 trans) but I don't even think I have ever seen a pic of one on here.

Just an FYI...