Quote: Ive seen weights all over the place, the Gen III's are lighter than a all iron small block for sure. On another site a fellow weighed his truck Eagle 5.7 at 512 lbs. with no accesories and no fluids. Another fellow weighed his low deck 470 that was all aluminum but block and it came in at 519 lbs with 7 qts. of oil. Im not going to a Gen III for weight savings. They just flat run and are efficient pumps.
They are definitely lighter than a stock small block. Possibly even lighter than one with aluminum heads.
And yes... they do work. Even the lowliest ov all... the very first-gen 5.7 300C engine... was rated right around what the 426 Hemi was rated at (345HP net vs 350HP net). They're what? 120HP MORE powerful now...??? Taking a first-year 5.7 out ov a junkyard car and dumping it into a 3200lb muscle car in pure stock form would make a FAST car. Believe it. But you would never do that... No. You'd add headers, exhaust, tune, delete accessories, cold air... hopefully use a stick. Yup... now its that much faster.
