thinking of doing the swap input wanted
Other then the bore and valve sizing what are the differances between the 5.7 and 6.1? Is one stronger the the other?
Yes, the cranks are a different material. 6.1 is stronger.
6.1 motors are at a premium, often double the cost of a 5.7 when bought from a yard.
You can pick up truck Hemi's pretty commonly now. The truck timing cover has the accessories mounted up high and is not as good looking as the car Hemi timing cover because of this. They are intechangable though it is actually the interference with the frame rails of the classic car that ususally dictates using the truck or spending big money on a custom acc drive system. If you get a car Hemi priced right, you can always just swap the timing cover.
I strongly encourage a cam change while you have easy access if yuo think you will ever want to do it. There are some serious power gains to get from swapping that cam. You can easily get the 5.7 beyond 400 crank hp with a cam/springs change.
I am using one Stu @
www.InertiaMotorsports.com . He is one of the leading buiders of aftermarket Hemi's. I'm expecting a crank hp of about 440hp for the otherwise stock 5.7. Expect to pay around $400 for cam & springs though you use 6.1 exhaust springs on all the valves.
On my 73 Duster, I am using stock K-member, TTI mounts & headers, a TF 727, XV carb manifold, MSD6 spark controller. If the v8 radiator can't keep up, I may use the 04 Hemi Ram truck radiator. It only requires a minor trim of the flap at the frame to slide right into place and they can be had at a pretty low price w/ a trans cooler.
For the flex plate, get an OEM for the Hemi and have the ring trimmed off.
I think I have all the parts to move forward with the install now. Once I start that the installation, i'll post a thread on that.
I'm also working on some discoveries that should help to drive the cost down having to get all these unique parts for 3G Hemi installs. I like using OEM parts where ever possible so that I can easily get replacements in the future if needed and don't have to worry about a custome part supplier still being around when we need them again.
