Tire size help

Ok gents here goes, Im sure this question has been asked a upteen million times but I couldn't find a definite answer.
Car- 1966 Barracuda, 14" rims, 10" drums

Currently car has 195/75R14 dunlops on it. 195/75's are harder and harder to find, unless you go with some cheap Chinese junk tire (not on my life!!!)
I did find 205/70R14's in BFG T/A's and a couple different brand 195/70's as well. Whats the difference? What originally came on the car?

I like the look of the BFG T/A's (something about the white raised lettering on a classic car is awesome) but would the 205's be too big for the car to handle/corner well?
Thanks gents!