just pulled my head off for a tidy up and new gasket.

just wondering whose running these heads and what tension should be used for head studs and gap for roller rockers

I've heard to keep head tension below 35 ft/lb or the alloy collapses...

re the roller rockers,
1.3:1 ratio, use normal clearance (whatever the cam maker recommends), often it's .016"
1.5:1 ratio, add .003" to above.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.