[mean81GT]

I am going to get the 5/8' flush bolts. But the engine builder did screw up. These heads weren't new, or aftermarket. They came off of this engine, and the backs of the heads now have the reducers for the accessory bolts. Yes, the heads are interchangeable, but the heads are now on the opposite side from where they were when he received the engine. Thanks for your help guys.