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did you fill the new filter when you installed it?
Another option is to add some fuel to the carb's float bowl so the engine will run and see if that enables the new pump to prime the system.
if the pump was installed correctly, the lob could be wiped...did somebody measure the rod's travel?
No I just push the rod up in the engine and I Made sure when I put pump in that rod was up so as to hit pump when cam turned I Think I pushed rod up 2.5 to 3 inches
You have to find it first....do you have access to a borescope? They are great devices for inspection without extensive removal.
If you are lucky, the nut will be in one of the intake runners above the intake valve. mechanical fingers would probably be good there.
If the nut passed the intake valve and went into the cylinder, you need to assess if it did any damage to the bore or the piston or the valve areas...
lets just hope it is still in the intake runner...