ive used crush ringed blocks before with copper head gaskets,,, and had no problems. when you get the copper gasket, lightly scuff up with abrasive pad,, clean block and head with thinners,,, use a good quality gasket spray!!! i used ACL BRAND back in oz, dont know what they have over here ( i will do some research for ya) lightly spray the block, head and gasket.......
hang gasket on a peice of wire when doing so.... MAKE SURE NOT TO LET ANYTHING STICK TO IT!!!! dust ect.
let them sit for 15 min to go sticky, lightly spray gasket again then fit...........
put head on dead straight onto dowles ( dont slide around to locate )
then your on ya way.......get that boostapumpin