Yes the exhaust manifolds from a 283 will bolt up to a SB 400....they are both small blocks. To make things easy, you will want to change the 400 over to the short water pump that the 283 used, as well as the pulleys and brackets from the 283. You could use everything that was on the front of the 400. But the alternator would then be on the passenger side, which would require moving the wiring. Plus the 400 would have a internally regulated alternator. That is a better alternator, but then again will require some re-wiring. So like I said, to make it easy, go with the 283 water pump, pulleys and brackets.
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Originally Posted by Touchdown67
Hello, Can anyone tell me for sure if a pair of exhaust manifolds off of my 65 C10 283 will fit/work with a 79-82 Chevy 400? I hope the alternator will line up. Do I need to use the old or new brackets. Thanks for any help....
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