My old '89 GT had 3.55s behind a T5, so I'm familiar with the gearing "feel".
I'm not concerned about off the line speed - more about engine RPM at high speeds (120+). Track days with the C4 are numbered, and I can just keep the rpms down if I do go out, so I'm thinking more towards the future when I do drop the T5 in. I do know I'll be rowing a bit through the turns, so with manual steering I'd like to keep the rowing to a minimum lol.
According to some calculators, 3.55 is more engine/rpm "friendly" at higher speeds. If the rear wasn't making so much noise (it's better with the new axle bearings, but I have my doubts it's actually fixed, especially since the noise *completely* went away when turning around to the left. Thinking a side gear is worn out.) I'd keep the 3.23s.
1966 Restomod/track car, 1973 Q-code Mach 1, 1997 F250 diesel, 2000 VW Beetle Rallycross car, 2010 Crown Vic (ex-City of Lakewood PD), 2015 Focus ST-2