Heres the deal i put a performer TBI intake manifold from edelbrock. Also the heads i have now flow freely because they are the older ones. the question is do i need a higher PSI fuel pump? I think the stock ones are max 15 PSI and GM sets them between 11-13 PSI. The reason why i ask this is because i added these mods and for even a stock motor the PSI is not enough to its peak and with the mods i have i will be running lean all the time.