diff --git a/firmware/config/engines/chevrolet_c20_1973.cpp b/firmware/config/engines/chevrolet_c20_1973.cpp
index a6484cfdaf..3a60ff940a 100644
--- a/firmware/config/engines/chevrolet_c20_1973.cpp
+++ b/firmware/config/engines/chevrolet_c20_1973.cpp
@@ -1,6 +1,7 @@
 /*
  * @file chevrolet_c20_1973.cpp
  *
+ * most stuff is from a 1991
  * 5.7L SBC
  * 4 wire IAC
  * 8 pin HEI module