and you'll need an electric fuel pump, since the 3.4 doesn't have the place for the mechanical. Doesn't have to be very powerful if you're keeping the carb.
and speaking of carb, I highly recommend upgrading the stock carb. :thumbsup: Some may disagree, but I own a 2.8 and that stock carb could choke the life out of a lawnmower. :fs1: