I just found out that my supposedly externally balanced 340 has a forged crank. My trans had the weighted torque converter for sure but now I am questioning what harmonic balancer the idiot before me, put on the car. My engine is at the machine shop right now and the balancer is not where I can get to it right now. (Laid up from hernia surgery right now). My buddy looked at it and found the number 3614869 on it. he also found an 11.29 an N on it and a letter S with a circle around it.
Can anyone tell me if it is possible that someone could put on the incorrect balancer (will it physically fit?) Can someone show me pics of the different balancers 360 external vs 340 external vs 340 internal vs 318? I really want to be sure because the previous owner has already done some really weird things to the car and I have spent a lot of time fixing them. Please help.