Given the date (1989) and color of the stone, this is likely custom lettering by Coldspring Granite and drawn by hand. The lettering at the bottom has been digitized and is called “Runestone”, which is a Coldspring font, but the MLC is not aware of a font that matches what is used on the names and dates. The style of numeral 7 shown here, with the slight curve inward at the baseline is very rare to see in digital typography but was used commonly by English stone carvers. It does show up, however, in the commercial fonts “Perpetua” (in the old style numerals) and “English Engraver’s Roman”. It is also seen in a handful of North American memorial industry fonts which were based on English lettering styles, but none of them match what you have here.