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Found the Grand Canyon on my Flywheel - Recommendations Please

kerfuffle

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70 Cuda was juddering violently then started slipping a few drives later. Pulled it apart to find large cracks in the flywheel and the kevlar clutch disintegrated. There are even some cracks in the pressure plate. Only ~3k miles on this assembly. Any recommendations on a new clutch/flywheel? Mostly stock 68 440 HP w/4 speed. Plan to build it up to about 500hp.

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Ricks72Chlgr440

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70 Cuda was juddering violently then started slipping a few drives later. Pulled it apart to find large cracks in the flywheel and the kevlar clutch disintegrated. There are even some cracks in the pressure plate. Only ~3k miles on this assembly. Any recommendations on a new clutch/flywheel? Mostly stock 68 440 HP w/4 speed. Plan to build it up to about 500hp.

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Wow, you dodged a bullet that thing did not come apart and come through the floorboard! Ugh.
 

Chryco Psycho

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I was able to destroy a clutch in a similar fashion in only 50 miles .
You can use SFI parts for better durability , Feramic / Velvet touch discs will survive a lot more abuse , A twin disc is recommended , I still prefer the Borg & Beck style over the diaphragm , McLeod used to make a B&B/ Long twin disc which I have in my car now but I believe it is discontinued but you can ask .
I Had a 440 Duster , it would do 60' in 1.4 with the front wheels up & mid 11s in the 1/4 , the velvet touch survived but it was blue from the heat from slipping , a better clutch probably would have got me into the tens as a fully functional street car in the mid 80s . it had heater , wipers , stock buckets & carpet but a 6 pack hood scoop !
 
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