"An interesting detail about that L88 air cleaner. If you run without it, the engine goes from 500hp to about 600."
I guess then it isn't the best choice after all...
https://www.summitracing.com/parts/sum-239525b
I will try this one and turn it 90°, so that it sits in front of the deck lid. I also bought 2 spacers (1/2 and 3/4 inch) between air filter and carb.
I'll let you know what the afr gauge says and if I am able to see traffic behind through the mirror afterwards.