4043 to TDA?

[Roy]

Have a 4043 SN# VCV37XX. Would it be possible to have this converted by changing internal parts to traditional double action? Is is to early of a model?
Would send to S and W for the work and have the frame re-coated while I am at it.
TIA
Roy

 

[vista461]

I believe only the TSW DAO models can be changed