http://www.supramania.com/forums/showthread.php?t=16737
i have XTD's stage 3 clutch and their 11 lb. flywheel combo... no problems for the 700 or 800 miles i got to put on it before i blew my HG!
try uploading your video to photobucket.com... wish i had an answer, but i am sure one of the senior guys will chime in once the video is up. good luck.
Edit: seeing the video, i think a bigger problem is the valvetrain noise.
i have it and i liked it for the 7 or 800 miles i got to use it before i blew my stock HG at the drag strip. here is the review...
http://www.supramania.com/forums/showthread.php?t=16737
you need to get your head and block machined for that Cometic HG. i would also either get brand new stock headbolts or upgrade to ARP headbolts or studs. you may also want to consider doing basic tune up too, like new spark plugs/wires, change all fluids, etc. good luck.
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