Thanks for the post. 

Honestly, no, there is no such thing as an automatic "straight conversion". While the same shaft and specs may be transferable for some people, it most often does not work. Your old clubs could have had different lofts, different stock lie angles, the shafts could have been taper tip Vs. parallel tip, etc. There are too many variables to say what could be different. 

With that said, it would be tough to give you any recommendations without seeing you hit balls. I would try to see a local Titleist fitter to see what loft, lie, length, shaft and head model truly works best. 

Please let us know if we can help in any way. 

Thanks.

I'd take Bubba's advice and get fitted.  Especially coming from a different brand, it's unlikely the same shafts and maybe even the same specs, will perform the same.