It's nice to know a trustworthy mechanic, but sometimes your car needs more than a quick fix. The next time your Civic's engine explodes on the 110, make your way to Soken Trade Corporation. Tucked away in a warehouse/garage space in North Hollywood, this shop sells used motors and transmissions for various Toyota, Nissan, Honda and Acura models. The products are all made in Japan, and the engines are moderately used and reasonably priced, with 40,000 to 50,000 miles on them. The sales staff are all business, but they offer warranties, free deliveries and the phone number of a dependable neighborhood mechanic who can do the installation. Best of all, you're free to peruse hundreds of these hulking mechanical contraptions sitting on the showroom floor and hand-pick the one most to your liking.