They rec. the 19.
Its such a perfect match as well, fits right under there. The metra 65 ports are big and that intake is meant for that 19mm delorto.
You didnt sieze your metra cause of that tho, just improper jetting.
Also, when you jammed that crank in did you do seals then check for leaks?
Jetting numbers dont mean shit if your sucking in half the town through your seals.