Would a rubber o-ring fit in ok?
I can't remember exactly what the gasket looks like now.
Most replacement fuel filter elements come with the rubber seal as well. I would get one of those and replace the element at the same time.
It's a good idea to replace the seal each time the filter is changed.
You need to be watching to not cause a fire always -with leaking gas on a hot engine
Just use some caution
When any car sits for this long there are a number of proceedure to be done before attempting to start -and drive the car
Some examples :
An oil and filter change ( you need the correct oil for a flat tappet cam engine )
Remove and replace the fuel in the gas tank( has gone bad ) 92 octane
The braking system must be gone thru to be safe
Fuel filter change
All rubber hoses for gas and coolant SB replaced ( can be dry and cracked )
Need gas hosing for ethanol gas used today
All coolant rubber hoses (so they do not rupture out on the road )
Any engine vacuum issues addressed
I like to get the engine to run correctly first and then do what is required to get the car safley on the road
Not a complete list - but you get the idea
Once on the road --the joy of owning a Classic Antique Cadillac will be very evident
All fluids from the front to the rear of the car needs replacing and a trans filter change
I have good new gaskets for 5.00 each. These are superior to the stock gasket, as you can reuse these, and they are thicker.
email me at email@example.com If you live in the states, I can ship for 1.25
I do love that the car was passed down to you from your grandfather
My dad gave me my 64 convertible from his collection of early 60's Cadillacs
That family connection and the fact ---the car has stayed in one family --makes the car extra special in many ways
Loving a car so much you need to keep it around --says it all to me