Upgrade mechanical fan vs installing electric fan

Doing and engine rebuild on a 5.7 hemi and then swapping into my 71 scamp. Will be replacing the water pump and fan clutch. Looking at either upgrading to a better mechanical fan or switching over to an electric fan. I figured mechanical upgrade would be easier, but electrical fan seems like it would have more of a hp upgrade. I am also unsure if I switch to electric if i would still have a clutch or if it would just be a pulley on the waterpump.