The ball ends of the injector lines are pretty soft. They deform with over tightening then they have to be replaced. Not getting fuel to a cylinder won't cause white smoke.

Borrow or rent the A-B timing light in the tool rental forum for the straight way to set IP timing. You can get close enough with an IP locking tool. The tool has a slot which locks a tab that rotates with the IP shaft -



Set the tab visually just above center in the RIV port on the side of the IP. Put the locking tool in place with the slot oriented to engage the tab. Rotate the engine slowly until the locking tool pin recedes to indicate engagement. Read the crank pulley gradients against the TDC indicator. Ideally you'll see 14* ATDC. If not, remove the locking tool, set the crank to 14* ATDC, loosen the 4 bolts holding the IP tight against the block and use the same tool as you adjust IP timing using the turnbuckle.

The caveat is the o-ring between the block and IP might not appreciate being moved after 17 years in place and you'll have a dribble of engine oil pooling near the driver side engine mount.

Sixto
87 300D