I do enjoy these conversations. I didn't realize all the improvements made to the newer Ecoboost motors and 10 speed transmission. Doing some research I found this. Quite impressive. If you are going to build a Expy racer, the logical step would be to get the latest motor & transmission 1st. When it makes economic sense I'll be looking to trade in for a lightly used one as long as the reliability is there as well.
https://www.wardsauto.com/engines/ford-touts-second-gen-ecoboost-v-6-10-speed-trans-17-f-150
https://www.enginelabs.com/news/fords-gen-ii-3-5l-ecoboost-set-for-2017-f-150/
https://www.wardsauto.com/engines/ford-touts-second-gen-ecoboost-v-6-10-speed-trans-17-f-150
https://www.enginelabs.com/news/fords-gen-ii-3-5l-ecoboost-set-for-2017-f-150/