thanks for the comments. I recently purchased #221 and drove it from texas to the northwest. When I got home it started running poorly. So I changed vacuum hoses,plugs rotor and wires, o2 sencor, head gaskets, speed control unit, and still no fix. The only other thing I could think of was to maybe change was the little mini fuel injectors. Waited 4 days and paid 70.00 from ebay for the two, which was way cheaper than my local parts store who had a hard time even finding them. truck is fixed and runs puurrrffeecctt.. Its in really great shape.