Here's my 'Heath Robinson' way of setting the initial steering alignment. I strapped two 8 foot lengths of timber to the wheels with bungees. I then set the steering wheel to straight ahead and then aligned by eye the offside timber with the rear wheel. I then adjusted the nearside tie rod until the two lengths of timer was parallel. I also checked both timbers were parallel with the chassis rails. It may not be perfect but it will certainly be good enough until I can drive the car have it set up professionally.