I used to use IH red to match the early Chrysler red engine paint and it matched perfectly but in the recent years I've found that the IH red that you get at box stores and tractor supply places is deeper red. I recently painted some headlight housing rings for my dad's old B Farmall and decided I should get some new fresh paint. When I took them over to his place to mount them they didn't match. The color was darker than the tractor. I went to a different place and bought a different brand of IH red and repainted the rings. Still too dark. We got out some old, true International red enamel that he had from the early 70s and I scuffed the rings and shot them again with my spray gun. Perfect match that time. I have since talked to a couple of people who are pretty knowledgable regarding International/Farmall restorations and paint. They agree that the paint color has changed slightly over the years. The old tractors used to fade to pink and now with the later paint they start a bit darker and fade more orange. According to these guys there are actually four IH reds. IH50 (for the true Farmall tractors) IH1102B, IH201 & IH2150 from Tisco which are as close as is available after all the years.
For several years the paint suppliers sold red paint for engines and used the same color for Ford engine red and Chrysler red. Some still do. That was definitely not correct.
I know years ago (1970 I think) a friend was changing his water pump on his 340 and got engine spray paint right from Mopar so his water pump would match. It was way off, not even close to the rest of his engine. We painted it IH red and it was almost perfect.
Good luck in your hunt!
