swap from 3.73's to 3.55's???

hey guys , i appreciate the help. im gonna check the rear gears and the tranny ratio.

i wasnt aware of the fact that there is an overdrive 5 speed and a non-overdrive 5 speed....or am i not undestanding.when i shift from 4th to 5th my rpms really dont drop much...seems like a real close ratio tranny. thats why i came on here when i first did my swap and asked if someone made a low gear set or a close ratio gear set......
 
There is optional gears for the T5. They still have a fairly deep OD gear. 4th tends to be 1:1 and 5th at least ~.75:1. There of course other trannies out there with a 5th 1:1.

BTW if you take all of the plugs out, you can obviously spin the motor easier than working against the compression.