good stuff there red58 what did you mean (I wouldn't use more than 7# on an original 58 rad),, is that 7 lb cap ?? ,,,, my fluid is about a 1" down and i think i am runnig 50 /50 and i used distilled water too not tap water ( dont know if that makes a difference ) but i will check with laser gauge

thanks

1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny