Ok so my 98 z24 is leaking antifreeze but its not coming from any of the hose or from the radiator and i know this because when I first found out bout it I put brand new hoses and a brand new radiator in it but it still leaks and when i add antifreeze into the resavoir and start driving it starts leaking out of the cap on the resavoir ? So do i need another resavoir or just a cap??

it sounds like your cap is screwed up.... its not keeping the system pressurized so it mite be the cap

ok because when i pop hood an look its got anti-freeze all over top of resavoir

Replace the cap and be sure the cooling fan works when the car gets hot .