We torqued my indy heads on to my world aluminum block the other night ...
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)
...guess vale lash has to be tight cold as well?? .005?
IMO 70 or 80 ft-lbs is fine, I would prefer 80 with a composition head gasket, as they tend to need retorque after a heat cycle.
For valve lash with the aluminum block and aluminum heads combined, I suggest at least 0.010" tighter cold (75F) and as much as 0.015" for a starting point is reasonable. Hopefully your cam is designed for enough hot lash so it is OK on cold start being tighter.
e.g. 0.028" hot lash might be around 0.015" cold (75F)
