downtube shifters mounting
Hi all! Your help is highly appreciated!
I'm about to replace my old Simplex friction shifters with not-so-old Shimano 600 or 105 indexed shifters. locally, I can find only shifters intended for mounting directly on the frame onto a dedicated braze-on. My frame does not have those, so I must install them using a clamp-on (if that's the word). My question is are the braze-on shifters compatible with some/any clamps? I can buy a 600 clamp but can find only 105 or late 600 braze-on shifters, and am not sure if those will fit.
Thanks!!!