That is a tricky question you've thrown up there.
We really need to know what the engine is you've got. ie valves, head work, carbs, cam, etc etc. A 1914 built mostly with stock parts will drive nicely but not be a real race machine, or built differently (heads cam etc) it can be a serious performer.
Also a lot of the guys here are working on their rides, so there are those of us that still don't know how quick they're going to be until we finish!
The turbo will get it moving for sure, if you want to go that way I would check out AJ Sims Turbo kit, as from what I've read he has a lot of seat time developing this.
http://lowbugget.com/main_page.html
I would really consider what you are using the car for, daily driver, weekend warrior etc, this is going to effect what you are prepared to do to it (ie spending the weekend fixing it so you can drive it to work on Monday isn't an enjoyable weekend if you do it every weekend!). If you want big power and reliabilitily be prepare to spend good money.
I'm afraid I can't offer any more advice, I am one of those still working on my car that has no idea how quick its going to be when I finish.
Good luck
Jeremy