A few questions for the pro engine builders out there...

How important is it to you to be 'in touch' with your customers regarding their build, from the machining to the recommendation of parts and component choices? Do you leave it up to the customer to decide what he or she wants, or try to steer them in the direction you know will work best for them based on your experience? Do you stay in contact with them, or wait for them to contact you?
Just curious.

The best thing you can do is be honest and thoughtful about what you want long term. Street car, Highway Cruiser, Drag Car, Road Racer, they are all different. It all goes into part selection and the combination to optimize each.