Spark Plug MR43T
AC Delco Marine Stainless Steel body Spark Plug # MR43T. This is the short thread (pre-vortec) used on many GM 350 engines.
Pre-Vortec GM 5.7 engines have "angled" intake manifold bolts, Vortec engines have intake bolts that run straight down.
Tags: Spark Plug MR43T