Try several out first, takes some notes, but realize that some people shoot a recurve better, while others like the American Semi-longbow, the Reflex-Deflex or hybrid. Bows like the Robertson Stykbow (1 or 2 piece), Pronghorn (1 or 3 piece), Black Widow 1 or 2 piece) might be ok in a 62" bow for a 29" draw, but 64" might be the ticket. These three will shoot toe-toe with any recurve and do better than most.
The longbow formula is different, because of the limb design. A 68" bow is recommend by most for a 28" arrow (then add/subtract 2" in length for every 1"+/- change in draw length. Hence a 70" bow for 29" draw, and 66" for a 27"). While they are not as fast as a Reflex-Deflex or hybrid, they may feel better and shoot better for some.
The last thing is the difference in style, due to the lower grip, and limb design. Switching from a recurve to longbow, Reflex-Deflex or hybrid may or may not be easy, and it is always possible to get help and guidance from an instructor while trying out a few.