I have a '73 1200 Deluxe with a 1500 Nissan motor and i am looking for info on Webers. I need to know what would be the best and easiest to install. PLEASE!! Any info would be greatly appreciated!!

Where are you?And what other info thats not in the Tech section can we help with

A worked A15 will like twin 40mm Webers or Dellortos , you will need a suitable manifold, they are easy to get, under $300 brand new.

It is all straight forward to fit, (unless you have a left hand drive car) but to get running right you will need professional help, as the jetting and tuning can be both tricky and expensive.

Having said that, if the pair you got were already tuned for a similiar motor you might be lucky enough to have them run OK without much trouble, (but that is not how it works in my experience).

I have some info and charts I can email you when I get home. Should be home in a couple weeks. Someone here might give them to you sooner if your lucky.

Here's a starting point for you

2 x 40DCOE
choke size - 30mm
main jet - 120
emulsion tubes - F15 / F9 or F16
air correctors - 170
idle jets - 45f9
pump jets - 35 / 40
aux. venturis - 4.0

This is assuming you have 1500cc, are looking to produce max. power at 6,500 rpm and prefer flexibility across the rev range instead of just looking for highest power output.

It is a starting point only, you should still get them properly tuned on a dyno at the first available opportunity.

Lots of info and pictures here: Carburetors (club wiki)