Caltracs and 3/4 Offset Shackle Kit?

Figure a full tank of fuel at 20 gallons for a rough number is ~130#, thrown on bumper and brackets, another 30-40#, you vert top structure, back seat, trim, etc. I'd put at least 250# in the trunk and see how it looks.

See, you can get Johnny to help out next time he's over surfing! :-D