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Old 02-20-2012, 01:22 AM   #9
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,254
Re: 1966 installing 5 speed

That looks to me like a NV3500 from a '88-'98 C10. I believe these are rated at 300ftlbs of torque, so technically they won't hold up behind a 350. However GM did put a few behind the '96-'99 Vortec 350's which produce 330 ftlbs of torque. It will depend a lot on how you drive. Also be aware that these transmissions have only electronic speedo outputs.
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