Just wanted to add a note or two for people considering NA:
1. ABF pistons are available in a few different CR's from the different vendors. If someone is just looking for the pistons they can be had for about $500-525 a set.
2. If people are looking for a more complete "kit" for a NA setup Eurospec is a good place to start.
3. The ABF head is more like a nice "mating" of the PL and 9A heads, using the larger PL intake ports and 50mm manifold.
Be nice if Jeff was still around the contribute as well. He basically typed me a parts guide a few years ago that was ridiculously complete and as close to a true ABF as a 16v ABA can get.
Nice work Svedka