I've been running an electric pump on my 84 for 8 years with no problems. Like triaged mentioned above, your carb will prime in a couple of seconds with an electric pump. The main benefit for me is that my 305 was prone to vapor locking with a mech. pump, but with an electric pump you have constant pressure through the system right up to the needle and seat and therefore the vapor doesn't have chance to build up.
And in those cases where you're running high RPMs for more than a second or two there is a much lesser chance of temporary emptying of the bowls.