Nothing extremely special -- just my newly rebuilt 2L with 10.2-to-1 compression pistons, bored .8mm over, stock bottom end, reconditioned head with SS valves, new guides, stock cams.
3000 miles on the rebuild and running really sweet so far. Gobs of torque.

1980 Spider 2000 F.I. (my hobby)
1970 MGB GT (my other hobby)
2008 Ford Expedition (daily driver)
2019 Harley-Davidson Electra Glide Standard
2019 Harley-Davidson Iron 883 Sportster