As has been pointed out, those numbers are rather arbitrary. For example, I'm 5' 10" with a 30" inseam (I have no idea what my pubic bone height is though I probably should measure it). I was professionally fitted and later had the fit double checked for my Bianchi. It's a modern bike but a standard diamond frame with a horizontal top tube just like 99% of all vinatage bikes. It's a size 57cm measured center to top (C-T-T). It's about 55cm center to center (C-T-C). I'd call it a conservative modern fit. My Bottecchia is 58.5cm C-T-C or a little over an inch bigger. That bike fits me with the classic "fist full of seat post" or really more like four fingers as I have big hands. I can just stand over the top tube though I have some clearance if I pull up (that pubic bone height thing Charles Wahl was talking about). Anyway, just my opinion but 57 C-T-C sounds a bit small to me for somebody with a 35 - 36 inch inseam but probably within an exceptable range. Somebody famous whose name excapes me right now argued that overall height matters more than inseam and since your only an inch taller than me it might be ok.