I am rebuilding front end on the 71 demon. This car is a original 340, but the torsion bars I removed were .850 which on the tech pages show out of 318 car. Question is would it be good to go to .890 or .920 bars or just put the .850's back in, no sway bar on car. 340 is mild build, car mostly used for street. Looking for better handling. Putting disk brakes on front & 11 inch drums on rear. Thanks, Steve