I purchased the distributor on the left from RockAuto. It was listed as Famous Brand T731. It came in a Carquest box. It's diameter (67.5mm) is smaller than an old OEM (pictured on the right) and aftermarket distributor (77 mm) I'm currently running.

I went to a local Advance Auto that use to be a Carquest location, that I've been shopping at for years, to see if they could tell me what distributor cap to order for future reference. All of the caps in their system for my 22R is the size that fits the OEM. They ordered in a T731 to see if what shipped from RockAuto wasn't the correct part. It was the same. Advance Auto online says a T731 will fit my '87 22R. The EFI distributor is listed as a T755. When you try to pull up the T755 on Advance Auto online, it displays the T731.

I'm wondering if this is a distributor for EFI? Anyone have any ideas? I can't use if if I don't know what cap/rotor to order in the future. Would my timing be different if I used this one? I've thought it might be worth keeping just for the advance.


Carquest T731 on left, old OEM on right

 

22RE (EFI) distributor does not use vacuum advance