f- body suspension

I put a late 70's f-body font clip ona56 chevy p/u. My problem is it sits too low. I should have put it under the frame instead of inserting it into the frame.
I need or wold like to lift it 2-3 in's, the Mark 4 coils gave me height, but the upper a arms bottom out.
Poor planning got me into this. It's my firt vehicle to build and 99% Idid by myself by reading and trying to find someone who actualy billt theres.
IF ther is an offset A arm or a awy to correct this I sure would like to know. The vehicle has been on the road for 5 years, and 23K miles. it just dont like pot holes or big bumps.

THANKS

Thanks, i'll see if there is enough turning clearence.