blowing out water :(

i'm going nuts with this car i need all the help i can get. Ive tyred all the things i can think of.. it's a 1984 mustang convertible the engine is a 302 bored .030 over all original front smog a/c etc i rebuilt the engine about a year ago just now got to put it in.. it will set and idol for a long time seems to do fine.. when you drive it it pukes out water to the jug at first thought thermostat sticking switched it same problem maybe bad cap tried a new one no change.. searched Internet found info on water pump direction put new one on same problem .. read about air in system drilled wholes in thermostat jacked car up dam near on its side to get the cap above the hose with same problem... the temp gauge goes all the way up past the hot level but the engine is not hot i tried a new sender but same problem i shot it with a temp gun it read 190deg going to try another radiator tonight maybe stopped up but just guessing ........any help will be appreciated

that's kinda what i was thinking but it seems to run good no signs of head gaskets problems anyway to tell for sure without tearing it apart

i'm going to try another radiator tonight and bleed the system one more time also does it matter if the heater hoses are bypassed i got a rubber plug at the water pump and a brass fitting blocking off the intake side i wouldn't think that would be the problem what do you all think?? someone told me to fill it up with water to the top of the thermostat housing take the belt off start it if it shoots out water when you rev it up its getting exhaust in the water from the head gasket makes sense to me what do you all think???