904 accum springs up down all around Or nowhere to be found

The large spring was left out of my 67 904 when previous owner had it rebuilt back in 84. It was a somewhat common practice, shade tree or poor mans shift kit LOL. Anyway...
The car sits here for months at a time and torque converter leaks down. Fire it up and go straight from park to reverse, there's brief delay then a BAM as reverse engages. I acquired a spring to put in it. If I ever do pull it to replace a leaking front seal I'll have it rebuilt properly. Meanwhile,,, I go from park to neutral and wait a few seconds for converter to fill, then to reverse with no hard engage. Upshifts through forward gears feel great though.