I am putting a 86 vette 350 in a 89 GTA. I used the 86 vette everything except the 89 TA oil pump and oil. Which capacity should i go by the 86 vette or the 89 TA thanks.

oil pump and oil PAN????????? If so, pan = determining factor.

Yes i changed the pan to the pan from the 89 GTA. So i would use what is stated for the 89 TA

yup, swap the dipstick for the TAs too

Thank you very much