I meant, if an Altec 817 cab is made to house 515b, canthe 515g be swapped? I am asking from a mechanical view point.
The specs for the bolt mounting holes say 14 9/16 - round holes, for 515B.
The mounting hole for G is 15
https://greatplainsaudio.com/wp-cont.../07/515b-1.pdf
https://greatplainsaudio.com/wp-cont...-Series-01.pdf