On the other side of the head, I've included a picture comparing a 426 Street Hemi and a typical oval port big block. Note that Chevy valves are not aligned like a small block, but instead are ...

The flow numbers for the BGE 392 Hemi cylinder heads are nothing to sneeze at; this is well into big-block Chevy race head territory and easily equals a CNC-ported LS3 cylinder head, but without ...

Ask a big-block enthusiast what they need to make 600 hp and chances are they will point to some sort of rectangular-port head. No one in their right mind would select an oval-port head to make ...

Chevy Big Block Cylinder Heads PCV valves - Proper Breathing Techniques. The Good, The Bad, And The Ugly Of Big-Block Chevy Heads. HOT ROD Staff Writer Aug 17, 2009. See All 6 Photos.

While the understandable culprit for the death of big block engines is largely attributed to the Oil Crisis, it's not the ...

Big Block Chevy VS 426 Hemi . For those of you who aren't familiar, Tony ... While Uncle Tony doesn't get into the heads in this clip, he has covered the Ball Stud Hemi in a prior video, ...

Seeking more horsepower and speed, Mopar engineers applied Chrysler's hemispherical cylinder-head technology, developed in the 1950s, to the Wedge's 426-cubic-inch big block, creating a 426 Hemi ...

Equipped with a hydraulic roller camshaft just like the HT502, this member of the big-block family uses rectangular-port heads and runs the same 8.75:1 compression ratio as the aforementioned 502 ...