hi, you could try www. hilton motorsports.com, i know he has gm 6 speeds , they are the stronger viper ones( bigger input shaft) with gm bellhousing, i know he is in canada( 1hr from niagara border) but he is in the states alot, especially detroit so he could ship from us side to make shipping cheaper, he is very fair and knowledgeable and would highly recommend him for anything Ls related. might be worth a try, hope this helps.
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