How do I swap out the default php for php 7.4?

I've installed Litespeed and have managed to get a vhost running.
I've done this by basically copying the config from the default vhost.
Looking at the phpinfo for both vhosts I can see that the php version being used is 7.3.
I'd like to use 7.4 router login 192.168.l.l
I've figured out that Litespeed comes with it's own php packages.
Under /usr/local/lsws I can see two directories: lsphp73 and lsphp74.
How can I switch my vhosts over from 7.3 to 7.4?
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