10 vs 12

[Captainps]

Picked up my 1965 chevelle SS.. it has a 10 bolt rearend. are the 12 bolts that much better??

[DCarr511]

It depends on the application.

If you plan on running it with slicks and launching hard at the track then yes. The 10 bolt it came with can take a lot of abuse if set up right.

[72chevmalman]

My brother-in law blew out his 8.2" ten bolt with a mild small block on street tires. I have been doing some research and I have found that if you have a 10.5", it should be plenty good for the street. The more common 10 bolt in chevelles is the 10.2" which is very weak (so I have found). For help identifying them try going to http://www.oldsmobility.com/10bolt-tech.htm .

[mdcamaro]

For the street it should be the last hing to worry about. The cost to put a 12 bolt or 9 inch ford rear in the car would be about $2500 because finding a 12 bolt 64 0r 65 rear is slim. You need to go custom. Check e-bay if you doubt me. $1500 for new axels, center, gears and bearing kit for the 10 bolt. The cheap way change fluid and put in one of those posi trax units.
http://www.powertrax.com/noslip.html