i have an 89 dodge ram 4x4 with a 360 in it. it ran before pulling the motor and replacing freeze plugs. now that the motor is back in it will not idle and sputters when driving down the road. i don't know if i hooked some of the connections up wrong or something but im at a loss it has a holley throttle body on it.

 

Re-check connections, maybe disconnecting the computer put something out of line (electronically) slightly for some goofy reason. Clean what is needed, even replace something if needed also. Maybe a pin bent somewhere???

 

If you had the distributor or wires off check plug wires and timing also.