It's to be expected since I've been building this '78 FJ40 for a year that the carb would gunk up. It was setting for 6 months before I drug it out of my brother's yard. After the motor rebuild she ran well for about 15 miles then she spit and sputtered like crazy. Get this! Someone retro-fitted a Motorcraft 2 BBL carb on this 2F motor. I think it's the same carb as on the Ford In-line 6 truck motor. So should I rebuild...never rebuilt a carb before but I have all the tools,air compressor,etc. It was converted to Manual choke. I'm probably rated a 3-wrench mechanic. I've done brake jobs,replaced power brake boosters,changed cluthces,replaced valve lifters,etc.....but only REPLACED a carb,not rebuilt one. If a mechanic charges me $50 an hour plus parts I may be close to a price for a new carb. What's your advice? ???