No of these replies has answered your questions .. I went from 3.55 to 3.73 nothing really changed as far as drivability ,& slightly reduced sixty foot same 1/4 ET ..My opinion the swap is not worth the money spent unless you do your own mechanic work .
I have a A10 with 3.73 and circle D converter..I would keep the 3.55 and just do the converter..I really didn’t see any gains from going 3.55 to 3.73 .
Lol honestly this was done on a back road no prep ..
Lund tune
17”Drag pack Mickey Thompson R radials
BMR rear suspension 3.73 gear
Circle D N/A converter
I believe it can get it lower around 3.2 to 3.3
He has the power adder version ...I have the N/A version with 373 gears ... The car blows the tire from a dig now no matter what rpm I leave at , I gotta new set of radials on the way 305/45 r MT ..No track pass yet waiting on better temps .