so trying to get a couple ideas here for a civic ED

so heres the plan
d14a1 block
d16y3 crank and pistons
d16z6 head
d14 carbs

the plan is to increase power without many exterior mods( its supposed to be a daily so mpg needs to be kinda low. and cops dont like hondas around here so i better keep the mods invisible)

anyone knows the block heights to find which rods to use
also using some velocity stacks on carbs
skim the head. try to get the compression around 10:1 11:1
and a 4-2-1 mani(dont know which one yet. tips?) and spoon street or twinloop final muffler.

and what kind of gains i could get with a stage2 cam? and what would be the increase in MPG on normal daily driving?

so anyone help me here?
thanks