so are telling me that i need to advance the timing and riching the carb? and this wasn't a dull orange with no exaggeration these headers were cherry red like a stove pipe almost all the way down to the collecters,if it would have been just a light discoloration it may have been ok but these babies were hot,hot never happened to me before thats why I'm looking for advice and appreciate all advice given. SO DO I NEED RICING AND ADVANCE OR LEANING AND RETARDING?and if the carb needs jetted what size do ya'll recomend on this 850 to start with? I was afraid that this joker was about to melt my headers off in a real short period. Oh by the way this carb came off a 427 stroked{540 ci} motor that was in a boat and 2 of the pistons were detnated if this helps any for giving advice.