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.

From what I understand earlier 318 blocks can be sonic checked for wall thickness, and often bored to a 4.00 bore.