Originally Posted by ap72
good intake for a truck. It helps on low end torque. It'll run out of steam at 5500, but you won't be driving in that range anyway.
He said its the RPM intake... they're good to more like 6500. I would stick with a performer.
All things equal, stroking a 350 to a 383 will keep the same peak HP but add torque and shift both the torque and hp curves lower; more torque available early in the RPM band is a great thing for trucks.
Talk to a local machine shop that sells shortblocks. You can usually buy 350 shortblocks for $800 or so, so they might be willing to work a deal that includes a couple hundred bucks more to trade your 350 core for a 383. Throw some Vortecs on it with a mild cam and a performer intake and you have a nice torquey truck engine. Nothing wrong with a 350, but cubes are king.
Take a look at this photo. It compares a 350 to a 383 with Vortec heads and a 196/204 cam. Same heads, same compression, same cam, just different displacement. As you can see they both peak at 300 hp, but the HP is found lower on the 383 and there is an additional 30-40 lb-ft of torque down low.