/6 to 340 swap

I've never had many cars that could even do a burnout if I tried/ which I honestly never tried much.... And even at that 904s don't hold up.
I've never owned anything but Chrysler products in 40 years of being a licensed driver.
I've rebuilt transmissions before, sent some out for bench rebuilds, but never really knew how to "beef one up". So most I have done have been stock overhauls. The more recent ones a mild shift kit maybe...
Though my first experience with a shift kit was on one of the first transmissions I was ever into was back in the 80s on a Cordoba, I put a b&m one in and was never happy with it, didn't need the 2nd gear bark every time it went thru the gears so that steered me away from any mods for many years after that..
Anymore I use a transgo, the mildest one they sell.