I found that my injector bowl was cracked on my 87 TBI 350. A friend had a TBI off an 88 454 TBI. The injector bowls were the same size and my injectors fit into it, but it needed a taller gasket/spacer between the base of the bowls and the throttle body. It now leaks gas profusely from somewhere, and I don't know why. So my question is are they interchangeable like that and I screwed up and made a leak, or is it leaking for a reason? On a similar note, my gas tank is for some reason not venting pressure, so much so that it literally flooded my crankcase with gas so I have to clean that all out too. Anybody know why my tank won't vent pressure?