hey guys i am in the process of building a 350. it will make 400+ hp with some spray. i have a t56 on the way to me right now. thre going into a 86 t/a. what i really want to know is what about my rear end. what upgrads do you guys recomend? or will it hold up to the drag racing i intend on using it for? I know there is a thread to explain some of this but im just looking for some advice from you guys. what you guys have learned over the years.

 

Everything you need to know can be found HERE

 

I doubt that the rear end you have will make it very long. I would guess that the first time you put sticky tires on it and dump the clutch it will probably bust. A after market 12 bolt or 9 inch would be the way to go. Moser, Strange and some others make bolt in rear ends for your car.

 

Thanks for the advice!

 

Take a look at this. http://www.hotrodders.com/forum/hill...ch-300274.html

 

I built a 10 bolt with some nice aftermarket parts.
That's worked out ok for a DD, automatic with street tires.
It cost me around 1,500.00 to do.

Don't waste your time or money on a 10 bolt upgrade with what you’re doing.
Defiantly a 9" or 12 bolt.

big gear head knows what he's talking about. Very experienced and Knowledgeable .

 

Thanks for the link but im at work right now and the network blocks the website. But it dosent block thirdgen.org! hahaha

 

I just thought I would post a photo or two so you can get an idea why the 9" is preferred over the GM 7.5/7.65 Ring and Pinion for certain applications.

 

i see what you mean. thanks for the advice i have been looking all over the web now for the right application.

 

Some of the guys here can explain what’s needed and what is the least expensive way of putting together the parts necessary for the 9"

I say 9" over the 12 bolt because that seems to be the preferred choice here.

Just for kicks and giggles I have included my 10 bolt build.
It’s worked well for me but it’s my DD,5.0,auto,with street tires so its all I need.
https://www.thirdgen.org/forums/tran...de-photos.html

 

your build is really nice. With what i plan on doing with mine im leaning twards the 9