I don't really want the heavy weight, gas gulping Hemi in this car, or even a big block 440. I drive it a fair amount. It's nice and light on it's feet with a small block. My 340 is set up for high rpm with a long duration cam. It has no low end torque, and drinks gas. It most certainly rocks from 3,500 to 6,000 rpm, but that's not how I want to be driving it. Anyway, I'm not in any big hurry to change it.