360 Engine balance with 727/th400 flexplate?
Just wanted to see your thoughts. My guy that has rebuilt my 360 says he balanced the block with the 727 flexplate. The 360 came out of a '88 gw with the 727. I'm putting it in my J10 to replace the 401 and it has the th400 behind it. Both have different flexplates, duh! So, the shop is saying I don't need it rebalanced to using the th400 flexplate. It was really his mistake when I told him to order the th400 flexplate and he got a 727 plate instead. I'm putting this engine back together, but would SERIOUSLY like to know if he is right or do I need to get it "properly" rebalanced with the th400 plate. TIA for your help!!!
'78 J10 Stock for now. 360, 44's F&R, T18, D20, TFI, 5 Slots, 31" ATs, Copper like color.