"I hate to disagree with you, but most of the external framed packs that I dealt with never had load lifters, whatsoever. My 30 year old Super Tioga in the basement does not, nor did most of the primary brands in the market back then."
Lets think this out. On most external frames the shoulder staps connect inside of the outer frame tubes, usually 3 or 4 inches away from the frame. So where would you connect the load lifter? I once saw an external where the load lifter connected to the pack bag; didn't seem like a good design. I don't doubt there might have been some externals with lifters, but probably as Matt suggests in later years when companies were trying to compete with the popularity of internals.
An effective load lifter needs to connect to a high frame above the shoulder strap connection point, where we get the 45% angle. McHale's P&G extensions and By-pass Harness work extremely well for heavier loads. But for the kind of loads we typically carry as lightweight hikers and the typical light packs on the market, most load lifters aren't going to be very effective. They might pull the pack closer to the back, but they aren't going to work like a real load lifter on the heavy hauler internals.
We can speculate all we want about the OP's fit, but until he puts all his gear, food, water, and fuel in it; and goes for an all day hike; then reports back with good pictures -- it is just conjecture. The pack looks short to me, but it might be okay.