He’s got the correct kit, that’s just the Gen IV part number. The ones you’ve got there are the Gen V versions.You may be looking at the wrong kit. The part #s I was told by Vintage air for the 82-88 are 964332 & 964333, believe he said the 333 has a larger blower motor and housing.
Both are built to order and the turnaround time is about 2 weeks.