Improving low valve lift flow

You’ll have to send in the converter to be done for you.
Anything off the shelf is just dicey IMO, or more specifically, for me. I’ve been a manual trans guy for decades. When it came time for a converter, I had my first two custom made.

You know the drill! Give them every last tie but if information and what you want out of the car and they’ll set you up.
Well when I first pulled it off the 360, and then decided to do the 340, I sent it to Tampa torque Converter/ American Racing converter (just to cut it open for inspection)the shop foreman said he felt bad to even charge me, because all he did was replace one slightly worn thrust washer, but, you got to get the owner paid... you know speaking of, I never got any paperwork on that, I wonder if he paid himself on that one? In retrospect it almost sounds like it!