Gas leak at sending unit

Got my new sending unit in an hour ago. What a pain installing the lock ring
with the tank in the car. Much easier to do with the tank on the work
bench. Now hoping it doesn't leak. Gotta add some more fuel to get it over
the complete sending unit mounting flange.

Every time I pecked on it with the brass drift pin it would slide off center.
You gotta have her dead nuts...hard to do in the car.

I put it to bed tonight...we'll see tomorrow