So, let's say you order a large amount of parts...

[ModernMuseum]

...from a large, reputable vendor here on the forums. I would like your input on how long it should take to get the parts. Assume you ordered the following, where the prime vendor coordinates everything and ships it to you (for the purposes of this thread, let's assume that the parts are for a 69 camaro since a lot of people on these forums are running this setup):

New LS crate motor and vendor does some modifications (cam, vintage front runner setup)
ECU/harness
6-speed t-56 trans, hydraulic clutch, all associated hardware to hook up the pedals
Hydraboost, new master cylinder
Vintage AC unit and all associated hardware

Assume it's around $20k worth of parts and you've fully paid up before you receive any parts. Now, after the payment, how long would you think it would take to receive these parts? Two, three months?

Ok, now, if you didn't receive them in what you felt a reasonable amount of time, how long would it take before you got agitated and confused that you haven't received the parts? Four, five months?

Now, say the parts are trickling in, but you can't do a bulk of the work because you're missing the last 25% of the parts and things keep dragging out on and on and on. How long before you got super pissed? Five, six months?

I'm interested in hearing from people's first hand experience or Vendors on the board concerning how long it would take to coordinate an order of this magnitude. Please keep this civil because I'm very interested in the replies.