stock rearend gear change

My 2001 maro a4 is pretty much stock nothing major just got the tranny replaced and took it to the track 13.2 was my best time explain that! Its got exhaust and a lid and thats it with cheap ass street tires before i had problems with the tranny the best i could pull down was a 13 .6. 13.2 is pretty fast right? Its gotta the same low ass stall and they said the tranny came out of another camaro! Anyway I want to swap in 3:73 gears and i would probably have a shop do it (how much is that gonna cost?:moon:Should i wait till way down the road when i can afford a 12 bolt of go ahead now. I commute some with it and take it to the track maybe twice a month when the weather is wright its got 63k mi on it. Is putting 373 on a daily driver 10 bolt like playing with a loaded gun? Give me you opinions and ideas thanks guys

and I wont be runny d.r.s with this set up!

if i were u , i would just save up for the 12 bolt ... your 10 might last u , or it might not , its kinda a shot in the dark of when its gona break .

guys on here drop gears all the time havent heard of any complaints, if your putting out so real ponies and run slicks i would look into a rearend.