J head max compression

Hi there i was just wondering if i could have some help, i have a La 360 disassembled. With forged pistons TRW 40 thou over zero decked block with J heads that are at 62cc which on my calculator says comp ratio will be around 10:8-1 . Is this to much comp for iron heads what will be the out come if i fit them up to the block will it get to much detonation.