I needed to replace my gas tank and bought a plastic 29 gallon tank
made for installation. However the old tank was 60 gallons and 37"
wide, 42 inches long and 10 inches deep. The replacement is 26" wide,
43 inches long and 9 inches deep. My question is from front to back
the tank fits in snug, but has 2 openings (are these what they mean
when they say baffles ??) and is not restricted in any other way and
has plenty of room on the sides and top. I keep reading that the tank
will expand 3% when I put gas in and was wondering if by having the
small areas of the front and back snug like it is, will cause me a
problem. Any help or words of wisdom are appreciated.

Jim