Missing at cruise speed

vsixer

Founding Member
Sep 23, 2000
219
0
0
Missouri
I have noticed a miss (or what soulds like a miss) while cruising in 4th at 35 to 45 MPH. I replace the wires (had 9 mm Ford wires), tried a friends digital 6, cleaned the carb inside and out, tried bigger jets in front, checked the plugs(all firing) front drivers tan, center two dark tan/black rear tan, front pass white/ tan, centers tan/ black, rear tan.

cars to choppy/ load to hear at idle. doesn't miss under full throttle/ or heavy load. Any ideas?


MOTOR INFO:
347
Eldelbrock RPM heads (new with motor)
Professional Products crosswind (generic air gap)(new with motor)
750 vac 3310 carb (new with motor)
headers 1&5/8 long tubs (summit leaking ass two piece brand)
stock ford diz with new mag pick up (old style mag. pick up type, two wire)
MSD Digital 6 (new with motor)
MSD Blaster 2 coil (new with motor)
new 8.2 taylor thunderbolt wires (had new 9mm Ford wires)
Bosch plugs (new with motor)
crowler hyd. roller ***513 (new with motor)
3" exhaust with flows and dumps
Motor has about 600 miles on it.
 
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