Oops! Sorry Ian, but as I suspected, you've bought the lower order kit... Everyone says that the Monogram kit is the best, and if that's the case, the others must be truly awful, as I've got that one, and it is HARD WORK.
My Monogram Hog suffers from typical 70s molding. GREAT BIG gaps in seams, innapropriate placement of seams (in the middle of the flaps on the wing undersides, for example), raised detail, and a few inaccuracies - mainly that the engine fans are too close to the front of the nacelles. I found this out just after spending hours filling & sanding them to remove the great big step between the fans parts & the nacelle outer. To say that I was gutted is the understatement of the week!
btw - I have the Flightpath update set, which you might be interested in, as it includes a weapons load out in resin PE and white metal. It also includes some nice details that you might be able to adapt. You could possibly be throwing good money after bad though. I'd probably re-eBay it & buy a Monogram kit instead.
I've got the spare fans from the Flightpath update for the Monogram kit if you're interested - I just couldn't face wrecking the kit parts after spending so much time on them. You might be able to stuff them into your AMT kit, provided you decide to keep it.