Evan
The modern engines you mention use a lot of electronic technology to get the high power output and great fuel economy they deliver. The 2017 Tahoe we bought In early 2018 has 15 computers onboard according to the dealer service department. One of the tricks it does is change back and forth between V8 power and V4 power. The 6-speed transmission does similar tricks. It was what my wife wanted although I could have happily driven my 1971 Dodge van that I bought new for the rest of my life. The Tahoe and similar vehicles have engines that a technology challenged person like me would never be able to graft into a street rod or restomod. A computer is required to do something as simple as adjust the idle speed. I envy those who have mastered the technology.
Just like the Ford flatheads you mention Gen 1 sbc rebuildable engine cores are pretty scarce now so for that reason alone their use in street rods will probably drop off to next to nothing.
Last edited by yar; 10/01/2018 4:40 PM. Reason: word misspelled
