The 2T-B upgrade is progressing slowly. After failing to find an original Celica TA60 2T-B airfilter house I ordered an open airfilter from K&H (part number 56-9138) and will get my second one once The Doctor will find his spare one. :P

Today I tried to clean the double carburetor setup from all its dirt and oil with a brush, a lot of paper kitchen towels and some petrol. After an hour I got exhausted (probably from inhaling too much petrol) and had to stop. The result is already a big difference:
2T-B upgrade: cleanup stage 1 - before
2T-B upgrade: cleanup stage 1 – before

2T-B upgrade: cleanup stage 1 - after
2T-B upgrade: cleanup stage 1 – after

I’ll give it a second try doing it this way and see if I can have it look clean enough. But as you can see: a lot of dirt and oil is unreachable for me, so I’m afraid I really have to take it apart to get it fully cleaned after all.