we got my 79 351w put in my 86 stang, when we fired it up she backfired through the carb (fire and black smoke/carbon stuff) now.. the heads that are on it are d00e that my buddy put together.. he said he nicked the valve seat a little on the intake valve so i was wondering if that would do it... or what else should i be looking at.. we rulled out timing problems and carb.. any other stuff im missing?
also we had to grind the bottom of the rocker a little on the exhaust springs cause the rockers were touching the spring retainers ... why would this do this.. the pushrods are the corect length.. the long ones.. i dont know this is very discouraging..
thanks guys
also we had to grind the bottom of the rocker a little on the exhaust springs cause the rockers were touching the spring retainers ... why would this do this.. the pushrods are the corect length.. the long ones.. i dont know this is very discouraging..
thanks guys