[QUOTE]Originally posted by MrMopar64
From what I can find it's somewhere around 69 to bout 80

Hope this helps

MM64

BTW here is the web site
http://www.chuckschevytruckpages.com/casting.html [/

think i have the firing order ok but when its in gear it backfires out of the drivers side dual, and dies out. any help appreciated. QUOTE]