[Any ideas what motor is in my Riviera]

Thank you guys I really appreciate the help from my knowledge i thought it was all original how would I know what transmission is in it.On another note on the overflow tank were the cap goes on there’s a hose that connects to it but after following i noticed it doesn’t connect to anything, is that how It suppose to be or does it got to go somewhere 

[Any ideas what motor is in my Riviera]

[Any ideas what motor is in my Riviera]

[Any ideas what motor is in my Riviera]

Were would I look on the motor to find that 

[Any ideas what motor is in my Riviera]

Anybody able to tell me if this was a 401 or 425 

[Any ideas what motor is in my Riviera]

It says 445 wildcat on the carb but I’m not sure that’s the oem one and help fellas 

[1964 Buick Riviera]

Ok perfect thank you guys I really appreciate the help.

[1964 Buick Riviera]

I need some help with the tire size on my 64 riviera. The current tires I have rub and can’t stand it so I’m searching for some new ones. I was thinking 2257015 but I heard that might rub too. So I’m trying to reach out to any other riviera owners and see what they recommend. Any help would be deeply appreciated.

[1964 Riviera tire recommendations]

What tire size do y’all recommend for my 64 riviera. Ideally I don’t want them to rub on the fender any help would be deeply appreciated.