sorry i dont ever write back on here haha
i ended up using a spal 10# the just barely fits.
so... the car was like hesitating after say 10 psi, my bf realized there was a 2g knock sensor in there, weird. Anyway, now it slightly breaks up at about 20 psi... looks like the spring is going to consist of the "guess and check" method... i f'ing hate that method. Oh well, its a diamond star, that's what happens haha