A-833 Lube help

I spent a lotta time and effort in an attempt to mod my brass and or cones to be able to use synthetic.......all to no avail.
I cut channels, grooves, and deglazed the cones, and even bias rough polished the cones, to the point that,on the bench, the slightest pressure locked the brass to the cones. And it was all for nothing. That trans was out and in, at least three times, in one week. In the end I went 50/50,ATF/85W
In the end I street slick-shifted it, problem solved. Shifts like lightning now at up to 7200, the highest I have tested; and best of all;no more missed shifts...at all, since 2004, ever!