Projects need help iding Navarro heads

I just picked these heads up with an old tub that raced the Arizona dry lake beds. The heads were never on the car I was told from the man who owned it he had bought them with intention to put them on the car. I haven't seen these heads before with no thermostat housings was hoping for some info. Thank you in advance

 

I don't know about the heads, but if you are going to mention the tub.....you need to show it too

 

I believe the Navarro heads you have were originally intended for marine use. This set of heads would be quite rare.

 

navarroengineering.com

 

here is a picture of the tub the man had it since 67 the****le says 62 but believe to be built in mid 50's late 50's the wheels on the front are just for rollers from previous owner! ! I will be talking to the original builder next week who is in his 90's

 

Btt