My search for a shorty D100 is over

Somewhat similar building in mine. +.060 318, ported SM’s, Comp Magnum ductile roller rockers, China gap intake.
Similar drive experience as someone stated before. Design is like a shoe box ( but I like it) and you can feel something akin to parasitic loss due to wind resistance. The faster you go it exponentially feels like there is a parachute behind the truck.

These things need brute force and modern transmissions.