Crap!

the new tank I got doesn't fit in the location of the old tank. Old (original) tank is #1245000949, new tank is #1245001749, I thought I was getting 1245001849. the old tank has the level switch on the end and the radiator hose going to the bottom. The new tank has the level switch and hose connection from the side and so there is no way to reinstall the air filer assembly plus I cant get the hose to connect because if it is metal pipe until about 4 inches from the expansion tank.

Any ideas other than looking for a new 1245001849 tank?

Also my current tank definitely has a leak around the cap collar where it connects to the plastic tank, as you can see bubbles as the engine gets hot now that I have a new cap that works correctly.