I just bought a 1970 Commander powered by two Detroit 8v 53Ns model 5082 5000. The specifications show a horsepower rating of 283 hp. The injectors are Type 74. I have not been able to find any information on these type 74 injectors on the internet and make the assumption that they were original equipment in 1970. Consequently, it appears that it would be prudent to update the injectors to the N series that is all over the internet. My questions. Other than increased fuel consumption what will change will be experienced with N type injectors such as N75s, N80s or N90s? Since they are not turbocharged, will there be a horsepower increase and, if so, how much? What is involved in turbocharging these engines and, if done, what is the change in life, fuel consumption and horsepower?