Hi, Got a 6/71 only run 5psi still a little high in the compression, on a hot day under load a little pinking. Waiting for the 98ron petrol to come down south that will make it better. The 55-57 T Bird are a great classic. Hope you have lower compression for your blower it's better to run lower compression and higher boost. I have been to lazy to put the lower compression heads on.