Web site for Pelland/All Rite (a recent merger) is www.all-rite.com.
and yes on some parts of the frame there's limited depth but a 6 inch
deep tank that fits between the frame rails can be a pretty good size.
Insulate them and then with the bellypan back in place they shouldn't
freeze - and quit being slow in getting that antifreeze in - only the
grey and black of course.
What is the size, year and model of your trailer again? Be ready to
speed a bunch of money if you're taking it down to the frame. I quit
trying to figure out how much I've spent.
Jo Ann