From the USCRA website as to the CB450:
"CB/CL/CR 450 (torsion bar valve spring type head)"
I would interpret that as meaning exacly what it says, 'torsion bar... type head' ....TYPE HEAD. It does'nt say restricted to using the original torsion set-up.
Anyone have any further info or comments?
BORN TO LURK, FORCED TO WORK.