suzuki v6 cylinder heads

[jay dezman]

since its been suggested i need to replace my head gaskets on my 200 (hp suzuki 1987)i may as well install the dual plug heads i have acquired over the years. i also have the rest of the ignition parts in order to do a complete swap.<br /><br />several questions:<br /><br />1.) any good suggestions about how to assure the head bolts don't break on removal?<br /><br />2.) any data on the relative cc of the standard single plug and the dual plug heads? as i recall from when i gathered the parts, the dual plug head is the only one suzuki will advertise a compression ratio for. has anyone seen comparison compression ratio's between the two?<br /><br />3.) how much can be milled from the heads (dual plug)to still stay within 145 psi compression pressure?