So I got my first mustang this winter, I got it for 2500$ 220k on it with a bit done to it it has 373, msd , 3.5 inch cold air , centreline rims 9.5 wide on rear well that's the good the bad is that when I pulled a spark plug it was to long for the car like 6 threads to long.... I was lucky that it dident hit but still. The mufflers we're suppose to be one n one out but for some reason they put them on one in 2 out and blocked off one Side by welding a plate on. caster camber plates are worn out they have been for a long time. They cut up a 3 inch air filter and put it on my 3.5 inch pipe with electrical tape with a big hole in it that let lots of air thro. They did a horrible paint job and it's been crashed the I knew none of the bad stuff when I bougth it fml..... But I have fixed the mufflers air filter spark plugs I have the caster campber plates not on yet , so what I have done to the car other than that is I put Mikky Thomson drag radials and a zex wet nitrous kit on it, I have gt40 heads that look like they were in junk yard for 15-20 years and upper lower intake off of a explore , is it worth getting them checked or just by some aluminum ones? How much nitrous can I run is 125 safe? What else would you guys do next? I was at a 1/8 mile track last week and I ran 9.68 2.1 60 ft it was up hill, with out nitrous and that's all it told me no mph no 330 it sucked how do you think that time is is it alright? I know ill do better at our 1/4 mile track