If your going to install the top mount. My measurements would probably work for you. My mounts are in original locations. Provided you used the shocks I have. Did you say yours is two inches lower than mine?. Is yours bagged?
This is a before and after picture when I lowered it.
Jeff 1964 Chevrolet K10 Fleetside "A Kid's First Truck" Follow in the DITY 1951 Chevrolet 3100 Follow his build in the Project Journals 1969 Chevrolet Camaro Convertible | 2020 Chevrolet Silverado | 3500 Duramax | 2021 GMC Sierra Denali USAF Veteran 1983-1987 | PSP retired 1990- 2012