OK so more confusion on whats going with the spark plug number.
so I scraped the sludge off the pass side casting pad and read the numbers
" V0125UO" so this tells me It was built in Flint on Jan 25th and the "UO" means 1969 307!! so according to this number its a 307, so why wont spark plugs for a 69 307 fit it? but plugs for a 73 350 are the only plugs that thread in?
anyone have ideas what's been done?
