727 TF transmission line fittings

Does anyone know if the flared fittings on the transmission end of the lines are single or double flared ? The motor absolutely cannot get dropped in until the lines r installed due to the fact I’m running TTI big block headers in an A body
If there’s ANY issue w linkage, lines etc in that area after the motor is in then the motor has to b pulled.
Just need to buy the right tools
Shutudown4