Some of our newer all-makes starter models have larger mounting holes-this makes them more versatile as they are able to fit engines with either size bolt. The mounting holes on newer models are five-eighths of an inch. That’s slightly larger in diameter than the nine-sixteenths of an inch on the older models. That difference, though, doesn’t limit if and where you can use the starter. The solution to accommodate the larger holes is quite simple and inexpensive. All you need are flat washers. We recommend a grade 5 or better washer for each of the mounting holes. This flat washer accommodates the change in bolt hole size without needing anything more. -- delcoremy.com​ -- Delco Remy starters and alternators from BorgWarner are the preferred choice for medium and heavy-duty truck, bus and off-highway applications worldwide. Learn more at delcoremy.com​. Delco Remy is a registered trademark of General Motors Corporation, licensed to BorgWarner PDS (Anderson) L.L.C. -- delcoremy.com​ -- Safety Reminder The various electrical systems within a vehicle are highly charged and may include corrosive, poisonous, and hazardous materials. To remain safe, you must: - Know where the nearest eye wash station is located - Always wear eye protection - Remove any metallic items that could create an electrical charge including watches and jewelry - Never smoke near batteries - Never use batteries as a tool rest - Dispose of batteries properly when necessary - Follow usual safety precautions near rotating machinery.