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Re: keeping stock rear with a sbc & th350?
Quote:
Originally Posted by octanejunkie
That 10-bolt is either an 8.2 or 8.5" ring gear, it's unlikely to have come from the factory with 4.10 gears, but you can easily check the current ratio by jacking up the rear, marking the drive shaft and rotating the tires, counting revolutions.
Depending on your tire size, you may want to consider 3.23, 3.42, or 3.73 gears max, without OD.
Check out a calculator like this one: http://www.coastdriveline.com/htmlfo...lculator2.html
You want to put the vehicle in the RPM range that gives you best performance from your engine - gotta know your cam and having a dyno curve wouldn't hurt.
I like this chart for reviewing RPM and gearing based on tire size
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The 10-bolt is an 8.5" ring gear and in my '59. It might be getting a 6l80e since I gave my kid my sbc385/th350 setup for his truck. That project got sent to storage to get his '55 done first. Found a local yard with an s10 4x4 rear with 3.42 gears but haven't had a chance to call them yet
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59 chevy apache 31 4x4 - my project: http://67-72chevytrucks.com/vboard/s....php?p=8668512
53 buick special - straight 8 sled - blow through turbo
47 gmc - flatbed hot rod build
99 ford econoline e350 - 4x4 converted family roadtrip/overlanding rig AKA 'Monstervan' AKA 'Daddy-Van'
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