[Jack21]

Do the stroker first, EFI last. Consider the 393 instead of the 408 for reliability. Look at the aftermarket heads with 2.08/1.60 valve setups to work better with strokers. 350 ci valves and ports don't work as well with 400 ci motors, and vice versa. AR 215 or similar.

Next, a hydraulic roller cam. The block lifter valley needs some machining for the spider, and roller tappets that can't be done in the car. In fact, if I were prioritizing these, and could only afford one, I'd do the roller first. Top off roller with CompCams pro-magnum steel roller rockers for street use.

If considering EFI, install fuel return line to tank, and O2 sensor bung in header or sidepipe, and plug it temporarily.

Put a Holley or Demon carb on it, and get the car on the street.

Then, at your leisure, play with the EFI. It will be infinitely easier if you have some EFI experience. Edelbrock and Holley have some nice carb to EFI conversion systems. Easier to convert on a running engine with before & after comparisons. You always have the option of reinstalling the carb.