Need some guidance on transmission/flexplate/torque convertor

dartboy09again said

So if I got to Napa or some parts store and ask for a TC for a 1972 318, would that work?

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As long as it's for a 727- the majority of 318s would have had a 904 in pass. cars. If you ask for, say, a '71 340 TC (ALL 340 autos were 727s) it would be neutral balance and probably have a little higher stall speed for a similar amount of money.