727 fluid level

I've researched this topic all over but never found a sure answer.

I installed my 727 about 2 years ago and used a Milodon braided stainless dipstick. I put a transgo shift kit in it and a 2800 stall. The engine made 304 HP at the wheels and it went 12.80 in the 1/4. It NEVER felt like it slipped, but it never had a good firm shift. It always shifted soft.

I built a 408 and decided to have the trans rebuilt. The builder insisted on using a TCI valvebody. The shifts were still soft and boring after the build. The trans locked up after ~20 miles, so i sent it back to the builder. It ended up being the reverse band piston turned sideways and smoked the band. He went thru the the trans again to clean it out and he double checked everything for the soft shifts and lack of downshifting after coming to a stop.

I put the trans back in and it's still the same! I'm thinking the fluid is awfully high. I pulled the dipstick back out. At the FULL level on the stick the fluid is nearly 3/4" above the top of the trans case. The add line is about level with the top of the case. I don't have a stock tube to compare with. I have a deep pan installed and I prefilled the converter, the trans took 9 quarts to get it full.
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