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Old 05-17-2010, 08:18 PM   #6
Dingfodgy
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Join Date: Apr 2007
Location: St.Helens, OR.
Posts: 876
Re: 283 heads on 350

Besides what others have said-with the 3.54 diff, I would seriously consider swapping over to a 700-R4 or 200-4r overdrive transmission. This will drop your highway RPM's about 30%. Converting to EFI would get you some gains, but can be cost prohibitive.
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