POSSIBLE INCURSION OF CLASS 'B' AIRSPACE.

Narrative

1) FIRST FLT IN P-51 MUSTANG AT YIP. CTLRS HAD MANY ACFT IN CLOSED TFC. 2) AFTER TKOF; I REQUESTED LCL TFC BE APPROVED OR PLT OPTIONS AT 2500 FT MSL. WANTED TO STAY CLOSE TO THE ARPT DUE TO IT BEING THE FIRST FLT. 3) TWR WAS COMPLAINING OF BAD RADIO XMISSIONS. I WAS ISSUED TFC IN THE PATTERN AND WAS LOOKING FOR THAT TFC. AT ABOUT BASE LEG; THE TWR ISSUED AN ALERT TO REMAIN CLR OF THE CLASS B AIRSPACE AT DETROIT METROPOLITAN ARPT. 4) I REPLIED THAT WE WERE AT 2700 FT AND WERE CLR. THE TWR ISSUED AN ALT SETTING AND THAT SETTING WAS CONFIRMED ON OUR ALT. 5) DURING OUR CLB; WHILE LOOKING FOR TFC; I CAN'T INDICATE WHAT ALT THE ACFT WAS OPERATING AT; BUT FEEL IT WAS NOT IN THE CLASS B AIRSPACE. 6) MORE AND ACTIVE AWARENESS OF ALT AND AIRSPD NEEDS TO BE MONITORED BY THE PLT AND THE CTL TWR WHEN OPERATING HIGH PERFORMANCE FIGHTER ACFT IN TFC PATTERN OR CLASS D AIRSPACE. 7) NO FURTHER ALERTS OR NOTIFICATIONS WERE GIVEN. NO REQUIREMENT TO CALL THE TWR OR APCH CTL. 8) MAY BE ADVISABLE TO BE SURE TWR CTLR CLRLY UNDERSTANDS OUR REQUEST TO REMAIN IN CLASS D AIRSPACE; 1000 FT ABOVE PATTERN ALT.