904 shifting problems 2nd to 3rd

This thing is stripped pretty bad. Aluminum panels instead of sides, no rear seat, no heater, no wipers. I have stock doors on it now with the glass but the ones that were on only had a piece of plastic stuck where the windows would be (not the wing vent though). I estimate the stock doors added 20+ pounds each. The car also had mufflers plus I weigh 240 so the car itself was probably 2800 or less. I am trying to get mufflers put on before this Sundays track day and will see if they will weigh it again. It is too fast now and needs to gain weight which it will cause I will be putting the interior back to stock with headre4st bucket seats and console from the 67 parts car. The car has a 5 gallon race tank in the spare tire well and it was probably 1 gallon down when I weighed it.

Hopefully I can find someone locally here to do the tranny work. I knew the stroker would find the next weak link. Gonna try putting it in DRIVE and letting it shift itself next time. Didn't work with the 340 though.