World block, Scat 4.5" crank, 9.5: pistons, etc...
Typical rotating assembly - nothing trick or expensive.

The only "special stuff" to the basic motor was:
* A very smooth plateau-hone using a gapless top ring and a "hooked groove" second. (Yes - the hone was more expensive to do). Pistons install with a "seating powder" not WD40 or oil.
* Cam specs are different, but not any more expensive.
* Heads only had a valve job.
* KB rocker stands and Comp valve train.
* Used a new "reverse flow" water pump from Meziere. (Had to drill air-bleed holes in the heads to use reverse flow).

This rings seated in 10 minutes and have produced very good results for me for a street engine. Other engines I've built with these rings really keep the oil clean after many miles. Leak down is nil.

The cam has a very wide lobe separation (114-116) with nominal lift (.600). Durations are 240-ish intake and 250-ish exhaust (@ .050). This is what gives this engine such good manners from idle on.