904 Trans suddenly stopped working

I'm betting the front pump is gone, because the converter was not seated correctly. When the trans is bolted to the engine (should not have to pull trans up with the bolts) there should be space between the flex plate and the lugs on the converter. Normally you should be able to turn the converter, easily, and/or move it in and out of the trans about a 1/4 to 3/8 of an inch.
In my early days I had a converter that was made too long. It was fully seated in the pump, but there was no play. It was tight against the flex plate. Made one 1/4 mile pass, stopped to pick up my time slip, car wouldn't move. The converter was made for use with a "block plate".
I contacted the converter manufacturer (Fairbanks), which is no longer in business. They were the ones that told me what was the problem, and owned up to the mistake (didn't blame it on me for not checking when installing). Made me another converter, and gave me every part I needed to repair the trans (even the fluid), no charge.
PS: This was Frank Lupo, back in the mid 70's, who is/was owner of Dynamic converters.