The first was done with the '81 engine that came in the car when I bought it. Unknown mileage.
The only mods were the K & N filter, electronic ignition with Accel leading coil, and empty cats on stock '81 exhaust.
This run was with the '80 engine of unknown mileage and mods that replaced the '81 engine when it coughed up an apex seal. This engine has a minor oil seal problem, and will blow blue smoke after high vacuum events, or longish periods at high RPM. Obviously still running pretty strongly, though! Supposedly, it's mildly ported.
Still jsut the K & N, electronic ignition, and empty cats on a stock '81 exhaust.