I would check that the cam timing is correct. Rotate the crankshaft to get the timing marker at TDC. Remove the rubber plug behind the upper radiator hose on the belt cover and check that the triangle on the cam sprocket is aligned with the pointer. The pointer may just be a 'tic' on the casting, rather hidden, or may be an actual pointer, vintage dependent. If you have to time your pump / dist sprocket, check that also.
If the triangle is not apparent, rotate the crank 360(one turn), and the cam will do a 1/2 turn which may align the pointers. If they align, put the plug(s) back and check for fuel and spark. The pump should run for a few seconds, and pressurize the system on each cycle of the key from OFF to ON. The plugs should spark (passenger/exhaust side for dual-plug heads) when the engine is cranked over by the starter motor.
tom