Here's one of the neatest setups I've seen to add strengh to the A frame; http://cgi.ebay.com/ebaymotors/Ford-...spagenameZWDVW You can also buy it direct from Dagel's without going through ebay, but it's the same price so doesn't much matter.

Like Jack said, with an X member it gets harder to deal with adding foot/leg room on a channeled car, but this is great for rigidity. If you're channeling, using a '32 frame would be a waste since part of it's appeal is the side member reveal. While they were stronger than the A frames, they were still fairly flimsy because of only having the K member. An A frame with an X member would be stronger than a stock style '32.