Hello, I'm Danny.
Just here to add my two cents. Adding a bigger cam, Higher compression, And better flowing heads always helps to make more power. Everything however needs to be synced to work together efficiently. When choosing these things everything must be planned for streetability and reliability. When you choose to build this motor everything must be taken into consideration like transmission torque converter size, Camshaft grind, Rear differential gear size, Compression ratio, Cylinder heads, and the list goes on. If you want to keep the engine carbureted like your Mark series you can switch to GM HEI electronic ignition to eliminate a points type ignition system like you have for better reliability. The 1960's, 70's, and 80's engines are denoted as the Mark series. If you want to switch from carbureted to fuel injection the FiTech and Holley Sniper are both good choices. Just remember you will to convert from a mechanical to electrical fuel pump due to higher fuel pressures. The Gen series came out in the 2000's. Gen 3 ran until 2007, The Gen 4 for you asked about started around 2005-2007 and included the 4.8, 5.3, 5.7, 6.0, 6.2, and 7.0 liters. Gen 5 was around 2014-15. These motors no longer use a distributor and are using coil on plug systems as well as fuel injection. You would have to add a PCM- powertrain control module or a stand alone system to make all the sensors work on your truck to make an old body style truck work with a late model engine. Let me know if you need any more information because this is a huge question with many options available. Building a motor is a big job that takes a lot of information.
Here is a cool Summit YouTube video to watch:
https://youtu.be/1T5ruycaD4M
Hope this helps and thanks for using 2CarPros.
Monday, August 23rd, 2021 AT 12:44 AM
