74 engine, replaced exhaust spigots. 4 to 4 open exhaust. Top end rebuilt to 836. Starts right up. Timing and carb sync done. #3 and #4 exhaust coming out (holding hand to end of pipe) is a bit hotter than the #1 and #2 exhaust. Not sure if this is common on these or if theres another possibility. #3 and #4 have a small exhaust leak at the head (ordered new gaskets).