Salarzae, you are more well informed than most, my man!
Indeed, ASC did all Celicas from the first to the last convertible. My old friend and ASC colleague, Brad Garska was the Lead Engineer on that project. I never worked on it but saw a lot of the design and it was manufactured at our ASC Long Beach California plant. Toyota would ship in partially finished topless bodies (wohoo!) with powertrain and we would install the convertible mechanism and cloth top and interior trim and electronics.
ASC set up a factory across the street from the Porsche facility in Germany to do the same on this 944/968 platform.
A funny story like my Ferrari story is that the Lead Engineer for that was my boss, Steve Laurain, who totalled the first $300,000 prototype on the Autobahn and he kept his job, now Vice President of Engineering for ASC.
The quality of ASC manufacturing was always a problem. They were more of a craft shop than a production shop...One of the reasons I left. And now ASC is in deep shit because they refused to change.
The owner of ASC, my dear friend and mentor, the Billionaire Heinz Prechter, a German immigrant, committed suicide four years ago, a terrible loss to us all.
The Toyota Celica and the Lexus SC400 Convertible, for which yours truly was the Lead Engineer, were soley because Heinz was able to convince the President of Toyota that it was a good political gesture to do so. This discussion happened when Heinz flew the Toyota president to Washington in Heinz's private jet and the deal was inked in the White House with George Bush Senior overseeing the whole thing.