The 3 layer gaskets from Burton are quite thin.

Use a ford item from a 2000 focus. 3 layer steel type just a fraction thicker or you can use two gaskets one ontop of the other to reduce compression / give you more clearance. Make sure to drill out the rivits if going this route though

What rods are you using?

Early engine use smaller rods than the later ones.


The last alternative is to get the pistons machined