what head gaskets needed to install alum. heads on 350 chevy

[Street Fighter]

I have a 350 engine that I am going to install aluminum heads on, I have installed heads before but never Alum.is there a special head gasket I need to use due to the difference in the iron block and alum.heads.what would be the torque on the head bolts or are they the same as the cast iron? do I need to use any thing on these gaskets or treat them as any other head gasket? What do you use on your head bolts when installing your heads?

[Redphoenix1998]

If you're running aluminum heads to an iron block you will want to use MLS gaskets. Cometic makes excellent gaskets so I would invest in them. You need to calculate your compression ration as there are different thicknesses. There are a bunch of compression calculators out there that will give you what thickness you should shoot for. It's not exact but once you have the spec you can shop and find a thickness as close as possible. As far as head bolts if you go with ARP head bolts the instructions will give you the torque spec specific to ARP for iron and aluminum heads. Personally I would run head studs. When you use ARP bolts you have to use the lube they provide for installing as the friction properties is spec'ed to the torque value you want to achieve.