Towing with My burb

[RussTburb]

I recently took the maiden voyage with my Burb pulling our new Travel trailer. It was a great trip except for the traveling part. The old girl just didn't seam to have it in her to pull the trailer. Here are the specs: 150 k miles on stock 402/TH400 2wd, coil sprung rear. Not sure on the gear ratio but I think its like 3.73 or 3.90, putts down the freeway at 60mph turning about 2200-2500 RPMs (This is not towing). I've put in a HEI dizzy, (NOT set the advance curve yet), and I need to regap the plugs (Set to .035 not .045). Overhauled the Q-jet and played around with metering rods, till I got a good "Redneck Dyno" (Power brake in my driveway!) The trailer is an Aerolite 26qs, weighing in at a respectable 4752 lbs empty, and probably close to 7k lbs loaded with water and gear and such. It is supposedly a "HALF TON TOWABLE TRAILER". Power, or Lack there of, was a bit of a problem, definitely not what I excepted from a BBC. The big problem is that it seamed to "push" all over the road and the suspension felt "Loose". I am using 10,000 lb Load levelers with out the sway bar. I'm Researching new springs and bushings for the Burb. Does any one else tow with these things? What should I except? I figured the "Big Blue Beast" would handle it like it wasn't even there, but boy, was I wrong! My wife was WHITE KNUKLIN it in the passenger seat! Any suggestions would be appreciated. Yes I am thinking of baggin' it just not slammin' it!