not too awful sure of the specs but i think a 250 is around 75-80 cc and it will run a 36" bar. or at least that i what i run on mine. for those saws none of the bar manufactures list the bars any more but the standard mount homelite bars fit right up prefectly if you ground the back of the slot out. i have seen a 380 before but i have never ran one.
physically toa sxl-925 they are a little bit longer cause they have a bigger gas tank. but i would put my money on the homelite first. the mac will shake the death out of you and make you go death. i am not sure if it is the saw or the sheer noise that the saw makes which takes down the tree whith those old macs.