[truckin 79]

No it has the new design cat on it now. I think the 78 was the last year a Big 10 did not have to have a cat, if I remember correctly. I adjusted idle mixture with a tachometer. The truck will start with just a turn of the key although sometimes it will start with a bellow of black smoke. I changed oil as well and plugs were a little dark but nothing to write home about. The carb is rebuilt by me about 6 months ago. The distributor is fairly new as well with a accel super coil. I think I am down to egr and cat as the only problems left. I think I will just buy a egr since that is cheaper and see if that helps.