I came across something (don't remember where it was) that said the 65 Ford PS pumps had different filler necks for A/C and non-A/C cars. The A/C equiped car had the large diameter filler and the non A/C cars had the small neck filler. Is this right? And is the small neck filler similar to the later cars? My car (65 convert 289) had A/C with a large neck PS pump. I am not putting the A/C back on the car.