Thanks guys for the info. I installed Daytona carburetor's new needle seat and the engine still does not run good. This truck has been converted to 12 volts. I read somewhere that you need a resistor installed when running a 12 volt system. I noticed the coil was very hot after running the engine for 15 minutes. I checked and the negative terminal on the coil has a wire that goes to the distributor Is this right ? The truck pulls ok some times and others it jumps and cuts out . when I slow to about 30mph with the truck not pulling hard it runs pretty good. When I speed up it starts skipping and jerking. Anyone have any idea what it could be?