I'm thinking of pairing up the L92 heads with the Katech block. I could go with LS7 heads but they are over twice as expensive. Plus I'm running this car on the street and the cam I choose will probably not breathe well above 7K RPM so I don't need a light, high-revving valvetrain.

However, I'm worried about the combustion chambers of the L92 which are designed for a 4.065" bore. The Katech block is 4.125, so the head will 'overhang' the bore by about 0.030".

Is this a big deal? Are there any downsides?

-ch