I love the wago-vans. Im looking to pick one up as a DD.
If it were me I would probably just throw a b18b1 ("Ls" motor) or a B20 (Crv motor) into it and call it a day and just cruise. If you wanted to get deeper into motor stuff I would recommend a LS/B20 vtec for a little more power; you put a GSR ,B16 or Type R Head onto the b20/ls block. I think your off to a good start though, just fix all the little things wrong with it (TLC-wise) and enjoy the wago-van
For suspension I would just browse TR's Honda/Acura F/s and pick up some used good suspension goodies, or there are 100's of shops to browse online. Try jhpusa.com thats where I got all of my suspension stuff.