5.7 Hemi injected or carbed or 383 carbed?

As far as the engine goes, the 5.7L Hemi fuel injected vs. carbureted is a toss up, especially if you use an 05-07 5.7L Hemi. Fuel injected motors require a more sophisticated fuel system, so this pushes the cost of a fuel injected hemi up a bit. Also, if you know how to properly tune a Holley, and have a used 650 CFM carburetor lying around this can save several hundred dollars, a not insignificant sum.

For a fuel injected motor you'll need to mount either an external or internal fuel pump in the rear of the car and install a pressure regulator. It can be done on the cheap for less than $300.00 but others have spent a lot more. Many spec a custom aluminium tank with an integrated pump.

You will need to run an electric fuel pump regardless of whether you run fuel injection or not, as the 5.7L Hemi has no provision for a mechanical fuel pump.

The 5.7L Hemi will be A LOT more expensive to install than a 383. You'll need at a minimum a new oil pan, motor mounts, and some mods to your radiator. The 5.7L Car Hemi doesn't use a mechanical fan so you'll need some type of electric fan. I THINK (don't quote me) some trucks used a mechanical fan, but I don't THINK (don't quote me) the truck fan will fit in an A-Body where the space between the front of the motor and radiator is tight to begin with.

If you use a stock k-member you have two choices for exhaust, you can use 5.7 Jeep manifolds or TTI Headers. Truck manifolds will not work, 6.1L SRT-8 Jeep manifolds can work with an Alter-k-tion BUT NOT WITH THE STOCK K-member.

A fully dressed 5.7L, 6.1L, 6.4L or 7.0L Hemi will weigh 80 Lbs. less than a small block and thus nearly 180 Lbs. less than a 383. If you plan to build a car that can go around a corner, the Hemi will serve you much better.

Regards,

Joe Dokes