First off Welcome to the site. Yes that filter will probably bolt on but you'll have problems tuning it. Do yourself a favor and buy a oem stock filter canister assembly. Being your a new member you don't have access to the classified section, look at the rules. Apple cider vinegar is one way to remove rust in a tank, search the site as there are other options too. Good luck and watch out they tend too multiply....
"HJ"
’84 YT60
’85 350x (423cc) with ’81 XL500 head conversion
’83 XR500 (628cc) converted 3 Wheel hybrid
’73 CB750 K3 converted 3 Wheel hybrid
’86 TRX250R chassis XR650L engine hybrid
’89 TRX250R (stock )
’90 LT500 Quadzilla
’85 FL350 Odysses ( water cooled head )
Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange