727 Trans Fluid Capacity

fishy68 said

You have to install the converter first then bolt it to the engine. Make absolutely sure you have the converter engaged all the way in (the flexplate lugs should be 3/8-1/2" below the face of the bellhousing) or you will ruin the front pump when you bolt it to the engine...

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Can someone explain why would I ruin the front pump if I bolt converter to flexplate first then hook it to the engine?

Regarding to fishy68, I have to install the converter first then bolt to the engine. I dont get this, if do it this way, how do you tight the 4 flexplate lug to the converter?