John it is no secret.

Arrow/mopar alum. block 4.155 bore x 4.05 stroke 12.5 comp, 6.125 rod 2.0 bearing .866 pin. With 1.5, 1.5 3.0 mm alky rings

Heads are 6.4 apache with some Brett Miller love, 2.14 / 1.65 stock valves, PSI 1515ml beehives with tiny ti retainers

Cam is hyd roller 258/264@ .050 .636/.620 lift 108 center. Intake is a Tall Ritter that Brett reshaped the plenum some / ported.

1050 e85 dom carb, hemi 6 ign, 1 7/8 to 2" step headers

This is my learn about gen3's motor. I will do a solid roller set up and try to make a little more power later