416 stroker temp?

Not sure how your trans cooler lines are hooked up but maybe an issue with the trans making more heat if the lines run to the rad
I am seeming to have real quick shift points from 1 to 2 to 3? I have been playing with the shift cable to get the adjustment there for better shifts. I have a built torque converter which my tranny guy said he ordered a stall speed of about 2800RPM. Speed shop said to be careful on the stroker motor for the street not to have the torque converter slipping all the time and making excess heat, but the car has run fine for 2 years. This issue just started yesterday??