90 over 318 Head Gasket info needed !!

Garys72Duster said
Is .090" over on a 318 even doable? Just curious, as I have only done big blocks. We usually go .020, .040 or at the most .060, but 60 is pushin it! How much overbore will a 318 take? Is 90 the max? Thanks.

Shane @ Crower Cams has went beyond 90 over
Im using a 68 model block that has been sonic tested and block will have a partial fill also.