Leaky Spitfires

I keep burning through the Gaskets with my spitfires, along the bottom of the drivers side of the engine, I assume the holes are not lining up properly?

Does anyone forsee any issues with me "elongating" the bolt holes a bit, so i can lower the header a bit, to hopefully allign the passages?

I am running Blue Felpro gaskets, that are marked for small block headers.