Rad Man;
The cold start valves were famous for leaking into the intake manifold.
The valve is located on the far right side of the intake manifold,it has an elect. solenoid ,and a fuel line to it.
On the valve assy. find and remove the 7mm screw,have someone turn on the ignition but don't crank,if gas comes out of the screw hole then the valve is bad!
M.F.