I followed Pete's design (Thanks Pete!!), with only some minor differences, and had some feedback to share with those planning to build a similar chassis dolly. Here's a pic of my dolly almost finished:

IMAG0439.jpg

As you can see, I only used 4 of the Harbor Freight wheels (Pete used 6). Load rating is 450 lbs each, for a total of 1800 pounds. I went with only 4 for 2 primary reasons:

1. I plan to have it on wheels before I reach 1800 total pounds.
2. If 450 lbs each is the advertised rating, they will probably hold more (If for some reason, #1 doesn't happen).

It feels perfectly stable and fine, and I have no worries at this point.

Moving on, I was pretty exacting in my measurements, and consequently the rear 1.5" blocks were just a tad tight and the frame didn't settle in easily. I wasn't sure how much room I had in either direction when building mine, but as you can see from the pic below, there is plenty of room for some adjustment. My suggestion is to increase the spacing between the 1.5" pieces (vs. the measurements Pete provided) by moving the circled pieces 1/8" further from the other piece. As can be seen, there is plenty of room to move that piece in the other direction as well.

chassis dolly update.jpg

That's all for now. I'm happy to answer any questions anyone may have.

Thanks again to Pete for a great design.