Flex Plate Question.....

I wouldn't go knocking the weights off of the converter just yet. If it was for an internally balanced 340 it should be neutrally balanced already. There are weights even on a neutrally balanced converter. If it is for an externally balanced 340 that is a diff story. If it is indeed a neutral 70 340 converter DO NOT knock the weights off. Then it will be who knows what.... If your 360 is externally balanced to mag specs just install the B&M 10242 and you will be golden. If it balanced to earlier L/A specs like the builder stated use the B&M 10236. I just went through this w my bro in laws 67 barracuda. He removed the 340, threw a L/A 360 in it and it vibrated pretty bad. He bought the B&M flex plate installed it W/O removing the weights on the converter (was already neutral balance) now it don't vibrate @ all. !st off you need to find out if your engine has been balanced or not. External Harmonic balancer?