Nope i had to change nothing. personally if i was going to have to pick from the powerglide, th350 or th400. id go with the TH350. good strong tranny, tons of easy to get shift kits etc. and less power loss than the TH400. TH400 is a great tranny but take more HP to run than the 350. powerglide obsolete 2 speeds. Great for drag racing, can be bullet proof built. But for the street ? why waste of gas.
i do like my 200-4r a lot i had it built to hold up to 400 to 500 HP, shifts hard and fast 2000 rpm converter. The ONLY thing I had to change was the length of the speedo cable, wasnt long enough, i think it was around 2k free shipping. i just gave a way 2 BOP turbo 350's