Red

iTrader: (4)

Is a 10 bolt worth building vs. a 12 bolts?I have a chance to buy a
10 bolt posi.lock.

taqwache

if you have a 4A and dont plan on running mid to low 10s then yes. but if you have a M6 then forget about it.

kossuth

iTrader: (12)

Here are my 2 cents. If your goals are bolt-ons around the 350 rwhp range on nothing more than a drag radial then you should be ok if all things are setup dead on. With a M6 car you can go with 4.10's but it does create a weak link that wasn't as critical before but some folks have run them with no problems just chose wisely. If you are looking at ET streets on nitrous or a monster head cam you might as well forget building the 10 bolt.