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Old 04-07-2014, 09:03 AM   #25
Roll'nSlo
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Join Date: Jan 2014
Location: Plantersville,TX
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Re: Another 489bbc question

Quote:
Originally Posted by 68c10owner View Post
700hp isnt going to happen with stock valved 781`s. 600+hp is possible but will take a lot of work in the right hands to get the 781`s to work very well. Best bet is aftermarket heads. Brodix Race Rite ovals or AFR 265cc ovals or the 290cc ovals if you can swing it and will get 600-650hp out of the box on 10.5:1 using regular pump gas. If your planning E85 then go with 12:1 at least to take advantage of it. As for the cam talk to Chris Straub at http://www.straubtechnologies.com/ He will design you a camshaft for your exact combo but he is going to need to know some details. He`s very good though.

You will most likely have to step up to a th400 unless you can find someone who can build the th350 to handle the power but they arent cheap. And keep the gears no more than 3.73, let that stroke do its job.
I'm a little confused. Here you said 12:1 and now you're saying 10:1.
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