heads

i am putting new springs on my older style 186 double hump heads that have been re-worked on with bigger valves 202/160 roller rockers guide plates and resurfacing. the springs are weak due to the time the engine sat not running for about 10 years. once i get the new springs installed and heads back on block how tight should i tighten them down, hyd lifters, cam is 234 duration, 485 lift. comp cam. thx phil