Hello everyone. I am 23 and have a 67 firebird, 4 spd with a 400. I have had it about four years now since I was 19, Its in ok condition, needs a lot of work but its something I want to learn.

Any ways spent a lot of time working on it past few weeks since I was looking to drag race it for the first time but it got rained out. Yesterday I had brought it down to get dynoed and before we started the guy said he wanted to check the plugs on it. Had one bad plug so we had gotten more but I believe he screwed up my firing order on it. The car just doesnt have the power it had and isnt idling like it was that morning. It stalled three times today while trying to put it on the trailer. It is a 400 engine, believed to be a 70 or a 71. Granted the engine has very very low compression in 6 out of 8 cylinders (one being 185 other being 190 and the rest are 158-160). If someone can please send me a chart or if they know the firing order on it. After yesterday I have a hard time trusting someone on it. I know my engine is going and looking to replace it but want to use it for the rest of the summer