What should the stock fuel pressure be, 94 5.0 5-speed?

I have a 94 convertible, 5.0, 5 speed and lately it has developed a rough idle. I've searched the forums but can't seem to find where anyone has posted what the fuel pressure should be on a stock 5.0.

Can someone please tell me what the fuel pressure should be with and without the vaccume connected at idle?

Thanks

Kelly