Thanks @jpsfj60 , again...huge help! Yes, please let me know the length and type of 5mm hex key bolt that would be necessary to attach the backing plate to the IP once the ACSD has been removed. You've been a huge help!!
For those wondering, I bought my o-ring and backing plate from a diesel injection parts store (M&D Distributors, website = https://www.mddistributors.com/) in the Texas area. They've been great to work with and I think the total was just about $30 shipped for both the o-ring and the backing plate. However, it would have been VERY nice to have the kit everyone is mentioning so that I have all the necessary parts together, as I also had to buy 16 inches of 3/8 inch coolant/heater hose, hose clamps, and it looks like I'll need to buy some additional 5mm hex key bolts as well
For those wondering, I bought my o-ring and backing plate from a diesel injection parts store (M&D Distributors, website = https://www.mddistributors.com/) in the Texas area. They've been great to work with and I think the total was just about $30 shipped for both the o-ring and the backing plate. However, it would have been VERY nice to have the kit everyone is mentioning so that I have all the necessary parts together, as I also had to buy 16 inches of 3/8 inch coolant/heater hose, hose clamps, and it looks like I'll need to buy some additional 5mm hex key bolts as well