340 problems

What diod the old intake gaskets look like when they came out? Is there raw fuel or marks from it (along with carbon) up in the intake port of the heads? Start with basics. You have compression, so it should be either fuel or spark. Is the tank full? is the fuel pump new? You set base timing. Have you checked voltage at the ignition coil? At the ballast resistor? Are you sure the plug wires are on in the right order? Dont race it until you fix it. You're just asking to break something worse.