904 Valve Body

So I took my car out of storage today and went to the gas station for fresh fuel. Coming home I pushed it to about half throttle and let it shift itself.
The 1-2 shift was good and quick, but the 2-3 shift flared like it always has.
It's a 904 with a Trans Go TF-2 kit in it.
This thing has been the pain in my neck for the last 5 years.
I've had it in and out of the car 4 or 5 times now replacing seals and checking clearences. I've had two different valve bodies in it. Adjusted the bands many times, throttle rod too.
Would a aftermarket valve body quicken the 2-3 shift over a stock valve body with a TF-2 kit in it? Would it increase the pressure over a TF-2 kit?
I wouldn't mind spending the money on a new valve body if it would fix it.
But the way my luck is I'd spend the 250 and it won't make a difference.