Yes thats a version of the same rad cap. Some will not seal there at the top.
I`d get one with a flip lever or a sealed top.
Attachments
radf.JPG (6.3 KB, 134 downloads)
rade.JPG (3.67 KB, 134 downloads)

~ BD.
"You won't find me in an old folks home" Pioneer Florida Cracker
1958 Apache Stepside
1958 Apache 1/2 ton Panel
1959 Apache 1/2 ton Panel