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How much power will a 8.5" 10 bolt handle?

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Old 12-23-2008, 10:28 PM
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Default How much power will a 8.5" 10 bolt handle?

Hey guys,
I'm building a '67 camaro rs/ss and I am putting a 427 bbc in the car with afr heads and a couple of other things and plan on making 650 horsepower. Will a 8.5" 10 bolt handle this much power or is it a no brainer to go with a 12 bolt. I'm not drag racing the car, just plan on making a fun driving street car but at the same time I'll probably take it to the drag every now and then just to have fun. Thanks
Old 12-23-2008, 11:48 PM
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+1 on the 12 bolt
Old 12-24-2008, 03:51 AM
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Originally Posted by piratebaseball
Hey guys,
I'm building a '67 camaro rs/ss and I am putting a 427 bbc in the car with afr heads and a couple of other things and plan on making 650 horsepower. Will a 8.5" 10 bolt handle this much power or is it a no brainer to go with a 12 bolt. I'm not drag racing the car, just plan on making a fun driving street car but at the same time I'll probably take it to the drag every now and then just to have fun. Thanks
just built the 8.5 get detroit truetrac if not u can sell me that 8.5?btw doesn't hurt to have a 12 bolt..
Old 12-24-2008, 07:41 AM
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I had a 8.5 behind a 468 BBC and it held up fine.I would put a stud support rear cover on there for extra support. But if you run across a 12 bolt cheap buy it.
Old 12-25-2008, 05:06 AM
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You will absolutely shred your 10 bolt. Go with something stronger. To be honest, I would probably look into the 9" rather than the 12 bolt. Upgrading the rear, as you said, should be a no brainer...
Old 12-25-2008, 10:35 AM
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Originally Posted by 98RedBird
You will absolutely shred your 10 bolt. Go with something stronger. To be honest, I would probably look into the 9" rather than the 12 bolt. Upgrading the rear, as you said, should be a no brainer...
8.5 10bolt isnt the same as the fbody rearend. 8.5 is pretty stout, i would build the 8.5 for now, then later on look for 12 bolt if you could find one
Old 01-13-2009, 09:18 PM
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no more than stock. 280-300...lol ask me how I know
Old 01-14-2009, 12:27 AM
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Go ahead and go with the 12 bolt man becasue the 10 bolt just sucks unless you rebuild it. But alot of members will say that you are wasting your money......
Old 01-17-2009, 10:11 PM
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7.625, IIRC, is what's behind the 4th gens. I like how many don't have any idea what the OP is talking about, yet they are quick to offer their opinion.
Old 01-21-2009, 06:27 PM
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theres turbo buicks running 8 second passes with 8.5 there really strong.
Old 01-21-2009, 09:14 PM
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Go with a 12 bolt or a 9" and never look back.
Old 01-24-2009, 09:10 AM
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GM should recall the 10 bolt and give us all 12 bolts lmao
Old 02-01-2009, 10:14 PM
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Old 02-01-2009, 10:18 PM
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i used a 9'' rear end on my 67...thats the pic above and here is the link to some of the work i did to the car...https://ls1tech.com/forums/western-m...s1-camaro.html
Old 02-02-2009, 02:00 PM
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The 8.5 will hold up fine as long as your not doing wheelstands with it, esp. if your running an auto. 8.5's are actually pretty strong, and I'd run it for now and save up for the 12 bolt.
Old 02-02-2009, 11:52 PM
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8.5 10 bolt's hold up pretty well but I would do a c-clip eliminator if you plan on running it. I have broken the large pin that holds the spider gears together and once that comes out, the c-clips drop out and next thing you know your axles shoot out!!! Almost feels like you lost your clutch then the *** end sits down a bit and you watch your tires start walking out from your side mirror!!! I did that on two different 10 bolt 8.5's with, what I consider to be moderately build small block Gen I motors. For piece of mind I would do a c-clip eliminator weather it be a 10 bolt or a 12 bolt.
Old 02-03-2009, 12:07 AM
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Originally Posted by piratebaseball
Hey guys,
I'm building a '67 camaro rs/ss and I am putting a 427 bbc in the car with afr heads and a couple of other things and plan on making 650 horsepower. Will a 8.5" 10 bolt handle this much power or is it a no brainer to go with a 12 bolt. I'm not drag racing the car, just plan on making a fun driving street car but at the same time I'll probably take it to the drag every now and then just to have fun. Thanks
I ran an 8.5 ten bolt in a '75 nova with a 438BB, and later with a 468, stock axles, rebuilt with an auburn and GM 3.73 gears.

It was a fun street car, meaning street tires and long burnouts for fun, but I did run it at the track with slicks going mid-low 11's, never had problems.
Old 02-07-2009, 05:57 PM
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some people have good luck with the 10 bolt and others dont... ill find out how strong a stock 10 bolt really is this spring
Old 02-08-2009, 09:37 PM
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It is really amazing how many people dont know what their talking about. The 7.5s suck yeah thats well known by everyone this thread says nothing about a 7.5 10 bolt 8.5s hold up really well just put good parts in it and the clip eliminator and dont look back wont cost you as much as a 12 bolt and will hold up fine for what you plan on doing.Everyone reads horror stories about stock 10 bolts busting not all 10 bolts are created equal there is a difference.
Old 02-09-2009, 07:04 PM
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If you're running an auto then the 8.5" 10 bolt will take all you can throw at it and then some.

I ran a 427 infront of a TH350/4.11 8.5" 10 bolt for years with out a problem.


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