My parts car 300Td still has the radiator expansion tank which I thought I might add to my 240TD that never had one. However, the tank has a barb for about a 1" line off the bottom which, as far as I can tell, must go to the radiator on the 300. My 240 does not have an extra nipple for that purpose. Would it be better to cut the bottom radiator hose and install a "T" and use that line or just plug it at the bottom of the tank and put a longer hose into the top from the radiator overflow like most other cars use?