6d8muscle
I'm Awesome
- Joined
- Apr 15, 2010
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- 131
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I did some searching but was unable to get any real answers. I have a 97 GMC with a 305 and I was thinking about a spacer. Do they make a difference on this engine at all? HP gains, fuel mileage those are the two things I'm really looking at. Any help would be great.