240d radiator--narrower than 300d? how about oil cooler?

[Sev]

guys, i'm trying to figure out if i can put an oil cooler from a w126 300sd, onto a 240d. i would put one off a 300d w123 into the 240d, but right now i have a 300sd w126 oil cooler in stock. i think i can make this fit, because the height of the 240d and w126 300sd radiator should be the same, right?

as for the width of the w123 and w126 oil coolers, i'm guessing the extra width of a 300sd oil cooler would fit in the space between the radiator and side-wall of a 240d body, because the 240d radiator is narrower than a 300d (w123), leaving extra space in there for a wider oil cooler (maybe even one as wide as the w116). would i be correct in this assumption? or would i be better off using an oil cooler off a w123 300d?