Let me throw out some "ballpark" numbers for what various options and additions might cost. Bear in mind that installation times vary widely depending upon what other work is being done at the same time. Some jobs combine and save time, others stack up and make things more challenging.
Alarm System. $400 for system. Remote start, door lock relays. Approx. 3-6 hours.
Power Windows $440 kit Approx, 3-5 hours.
Smartscreen Wiper Control, $55, Less than an hour.
Cruise Control, $400 for kit, Approx. 6 hours.
Daytime Running Lights, $250 for kit. Approx. 2-3 hours.
Fabricate custom wiring harness, complete with termination and taping, 10-15 hours.
Stereo. $400 and up. I work with Tim Thon of Car Stereo Plus, a local independent installer who is extremely gifted at working within the tight spaces and visual constraints our classic cars offer.
More soon, as more is requested...