Another problem.....I just put 50# injectors on my 87' GN, and now its backfiring and blowing flames out the muffler whenever I get on it good and it misses when I am just drivig it. I am a little confused by this and by the fact that the guy I bought it from is saying I had 40# injectors on it, but the guy who sold him those injectors said they were only 32# stock injectors. Its a BIG mess now....Can anyone offer any assistance? I am in desperate need!!!