We torqued my indy heads on to my world aluminum block the other night and my machinist was wondering if there was any thing we should know. always been to iron blocks.

So 1105 composition gasket and ARP studs think he went 30/50/80 what he used when torque plating it. (12.5 to 1 compression)

Any observations would be appreciated. guess vale lash has to be tight cold as well?? .005?

Thanks in advance.