Rear Spring Weight

I have been building up an Orange Patriot 66 over the last few months, its all now fully built, but the rear shock that came with the frame is a Manitou swinger 3way air shock. The spring is a 2.5x550lbs i am 13 stone, just wondered what the correct weight spring i should buy and also what air pressure to run. Thanks Rob
http://www.pinkbike.com/photo/5032417/
http://www.pinkbike.com/photo/5032417/
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i guess you mean a Swinger 3 way as if it was the swinger 3 way air it would not have a spring.
Go to TFtunned and enter the info into the spring calculator ( ot the one on Mojo)
download the swinger 3 way manual from Manitous webby and read about the max and min pressures for the SPV chamber and also how to adjust it.
Parktools :?:SheldonBrown