Here are the part numbers that cover the L model
0513240-18 Plt and Co-Plt Undrilled
0513240-20 Plt
0413261-17 PLT & CPLT Undrilled
0513261-8 PLT
I get the same thing except.......
For a 1971 150L the effective numbers are
0513240-18 either side, not drilled and when exhausted use....
0513261-7
0513240-20 pilot side drilled for switch, when exhausted use..
0513261-8
The 0413261-17 is not effective on the serial range of 15072004-15072628 the 1971 serial group.
Charles