If you are building you will not know until you check. Try and get .100 on ex. and the same on the intake side. This is plenty
of clearance.Every engine is different even if made on the same day by the same man.
Good luck, hope you get the ponies you need, to kick some bow-tie butt.
Idaho Mustang
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393,9.5" 351W
830 Holley HP
Victor Jr.
Home made Cool Air Pan
Pro Billet MSD
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