[robinaube]

Check the basics.

1) Do you have 12 volts at the battery?
2) Do you have 12 volts at the starter? Does the starter crank if you jump the solenoid?
2) Do you have spark at the spark plugs? If you eyeball the rotor, is the timing look right? Since the engine isn't running you can't check the timing the normal way.
3) Do you have fuel in the carbs? Do you see fuel squirt when you pump the throttle? The accelator pumps should show that your fuel bowls have fuel.
4) What is your fuel pressure? Did they convert the fuel pump to a carb-compatible pump or did they install at pressure regulator? I've seen many problems with the latter solution. The fuel pressure should be no more than 4 psi.

Tell us what you see and we can help you further isolate the problem.