Do you still use the water pickup from the drive?
New fuel tanks build up pressure too. By law. They cannot let air (fumes) escape. So unless you run them with the cap loose, they will build pressure
The 1950's pressuriized tanks are NOT DANGEROUS at all if maintained.-----------Rather have one of them then some of the plastic junk made today !!
Hello thanks for the reply... the coupler flange mates to the flywheel flush and smooth... the open end isn't level to the flywheel when the flange is
Thanks, that gives me a start.