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Type: Posts; User: Flathead4d
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10-11-2007 08:00 AM
Thread: 53 flathead ?
by Flathead4d- Replies
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If you want any noticible performance then bore...
If you want any noticible performance then bore it to 3-5/16 with a Merc 4" crank. Then with the right cam you will notice the improvement your heads and carbs will make. It isn't cheap but it will...
Is it going into a build, or making a trip to NM?
GM Engine de-coding