Newb question. How to tell sub types?

Should be on your drive side door sticker.

Your 1994 Celica ST with the 1.8L 7A-FE engine is an AT200. The only other frame type for a 1994 Celica (for the US market) was an ST204, which had the 2.2L 5S-FE engine.

93celicaconv said:

Your 1994 Celica ST with the 1.8L 7A-FE engine is an AT200. The only other frame type for a 1994 Celica (for the US market) was an ST204, which had the 2.2L 5S-FE engine.

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Thank you.
The 2.2L would be the GT version I believe. Seems that the difference besides the engine and probably transmission would be 4 wheel disc brakes? VS mine with discs in front and drum in rear. It only matters because I want to replace the struts. Right now it feels like I'm in a boat!

Because the engines and transmissions are very different, the frame is different for the powertrains as well. If you are asking about swapping out your rear drum brakes and install rear disc brakes, it is not exactly straight forward. Disc brakes are actually combination disc & drum - disc for typical braking, drum for parking/emergency brakes. As such, your parking brake cables would have to be changed to work with the combination disc/drum brake setup. You would need to see if the rear hubs are identical - I think they are between the AT200 & ST204, but not certain. If not, you would need to put ST204 hubs on your AT200. Your proportioning valve that impacts brake fluid pressure differences between front and back would need to be changed as well as disc brakes have a different pressure target for rears vs. drum. Doable - yes. Is there benefit for the cost and effort - very little if any.