I normally bowl righty and was told I cant bowl lefty to pickup 10 pin...that sux. Can I release with opposite spin to not violate the rules??
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185 avg with 8lb polyester ball

As long as you use the same hand for all deliveries, anything goes.  (if not ABC sanctioned, then you can change hands.)  

As a side note, we are entering an era that will/should pose problems for the rule makers.  There seem to be an increasing number of 2 handed bowlers.  I'd bet that for various shots one or the other hand is "dominant."  Where does this fit in?
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"Things fall apart; the center cannot hold; mere anarchy is loosed upon the world,"
I'm Ragnar Floggurass, and I approve this message

Rags - I would say which ever side you throw the ball from on your strike ball you would have to stay on that side.

If you throw outside your right leg then all shots would come from there.

Outside the left all shots from there.

Between your legs? I quess all shots from there.

I throw a 2-finger ball with both hands on the ball until my final 2 steps on approach. I dont need the same revs/speed as my strike ball on the spare, so the second ball is not held as long on the approach.

My irregular/erratic bowling style borderline conflicts witha ton of rules as I sit here reading the 128pg rulebook
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185 avg with 8lb polyester ball