Crankshaft ?
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Supreme Member
iTrader: (2)
Joined: Nov 2003
Posts: 3,400
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From: Antelope, CA
Car: 89 IrocZ/17 LS 1LE
Engine: 383/LGX
Transmission: 400/TR-3160
Axle/Gears: 3.08/3.27
Crankshaft ?
Im getting ready to do a mild build for my Iroc and I was thinking of going 383 because it would be the same price as a 350(355) but I know that most 3.75 cranks are from or for 400 block and need a 400 flex plate and balancer but I was thinking of getting a 3.75 crank with 350 main and was wondering if I stil needed the 400 flex plate and balancer or could I use the ones that I currently have on my 350
Supreme Member
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
In short yes, your not getting a 400 crank, you are getting a 383 stroker crank with a 3.75" stroke. Now there is internally balanced 383 cranks and externally balanced 383 cranks. Most are externally balanced, meaning you need a 400 flexplate and balancer.
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