rear end setup question

[rednotch88]

i have a Detroit locker with 31 spline,strange axels,c clip eliminators,ect... also have a TKO 600 with a .064 OD (5th) had 3.73's in her.can I get away with a smaller gear?It will see mostly track use with some street here and there.
Ran low on funds with motor so it may be a 306 with a nice shot of spray.When I was at track last time I believe I almost topped car out with 3.73's "in 4th"I want room to grow without taking rear end back apart. maybe 3.90's? Please I need some suggestions I need to buy a gear soon.
My goal is a high 9 low 10 second car in the end.(when i'm able to get the power plant I really want of course).

Thank you all do much for all your time.

 

[nunly94gt]

You were topping out with 3.73's in the 1/4? Thats wierd man? I had 4.10's in my old car running 12's and was in 4th at the end.
If you dont want to be topped out you need taller gears, 3.55 would be good.
I hope that is what your question was.

 

[billy86gt]

topping out with 3.73??????

what transmission do you have and what rpm are we talking i have 4.56 gears and im running 11.40 @119 and only turning 7200 rpm. i had 3.73 when it was a street car and i was no where near topping out.something doesnt sound right.If you put 3.90 your gonna be turning more than you are now.

 

[rednotch88]

Ima have to look more into this