fuel cell foam

just picked up a fuel cell new in the box, with the sending unit for a fuel gage. however it doesnt have foam in it.

i know i can get the blocks of foam and put them in, but will i have a problem with them moving and the sending unit getting hung up on them? sending unit is in the center just to the front of the fill, should i just put foam on the left and right and that will suffice?

thanks.

Thats what I did on my 8 gallon. Seems to work well for me.

Thanks, hopefully that cuts down on “slosh” enough.