So I have a head gasket leak or something. It is leaking antifreeze into the combustion chamber or else I have a cracked head. Also it is bubbling out of the radiator. I have GT40P's and all the mods in my sig. I know my heads are holding me back also. Do you think I would be better off in the long run to buy some new heads or should I get my GT40P's pressure checked, valve job, and ported to better match my modifications?