Just did a motor swap from a 1991 chevy 1 ton van into my friends 1992 k1500. There were alot of parts to switch over and the motor pull was a huge pain but to the problem at hand. All accessories were switched from the truck motor to the van motor and it ran fine. It has developed a miss that comes and goes. I thought it was a wire/plug issue so I addressed it first but it developed the same miss. We're thinking the distributor is the problem but we're not sure. Anybody got any ideas?