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12-06-2012, 05:19 AM
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#7 |
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Member
Join Date: Jan 2006
Posts: 222
Likes: 15
Liked 58 Times in 18 Posts
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Re: 427-425hp w/GM 401 heads
The iron head uses the 1.72 exh. and the 401 alum. uses the 1.84 exh and also you run at 435hp. with the alum. head 425hp with the iron head. Thanks
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