It would be nice for all rare Hi-Po cars to have paperwork, but this just always is not the case.
I'm not the only one who has sold Real and original drivetrain non paperwork cars, with owner history for market value.
There may also be other important clues to the Hi-Horse Status of this car, all of which, of course, could have been replaced, but much better to inspect on a surviving type car.
Original Fuel sending unit would have only 3/8 line.
If tachometer present then 6,000-7,000 Redline.
TH400 Trans with CX tag and Special Converter.
Deep Grove Pulleys.
772 Fan Blade/date. An original Fan Clutch will have an ink code.
499 Distributor/ Date
Radiator Tag will denote if Hi-Po.
The original Title app may also denote the highest HP rating. While not fool proof or 100%, it can still be a clue.
Looks like a very cool and Rare Pace Car!
Good luck with the sale.