83 vs 84 200x swing arms

[pcs]

my friend has an extra 83 swing arm in his shed so i wanted to ask if they interchange with the 84 swingers. the 83 is round tube vs my square tubed 84 but what about the shock mount set up? the reason i ask is im thing of chopping the 83 swinger and extending it about 4" and just swap in my sprockets/brakes/axle/ect.

[hillbilly 200x]

I think the 83 is pressed steel. the 84 would be easyer to extending because it is made out of square tubing.

[dcreel]

Agreed.. An 83 swinger is too weak to extend, not to mention an 84-85 swinger would be easier to extend.

The 83 swingarm doesn't use a shock linkage.

[pcs]

thx, i was looking to make a round tube one, im not a fan of square tube swingers and my original is in good shape and i felt it would be a waste to chop it up.
http://www.google.com/imgres?imgurl=http://i375.photobucket.com/albums/oo191/ltdyfz/YZF45020ladder20bar20pc.jpg&imgrefurl=http://www.yfzcentral.com/forum/13-images-other-media/83608-my-yfz-build.html&usg=__4rUtKzkVwQKxde-v9i-QyUTpucU=&h=375&w=500&sz=20&hl=en&start=0&zoom=1&tbnid=AzubO--qGMluYM:&tbnh=124&tbnw=159&ei=91X9TfieGaTdiAL4toCdBQ&prev=/search%3Fq%3Dslc%2Bcustom%2Bswingarms%26um%3D1%26h l%3Den%26sa%3DN%26biw%3D1366%26bih%3D677%26tbm%3Di sch&um=1&itbs=1&iact=rc&dur=993&page=1&ndsp=28&ved=1t:429,r:1,s:0&tx=90&ty=64&biw=1366&bih=677
i have one of these on my ltr 450 and i helped a friend make one like this for a 250r atc out of the original set up. ill post pics if i make one.