With 750 odd hp if you have a relatively high rev limit you will still struggle with a big tooth box or any kind of synchro box if you want decent fast gearchanges.
You can fit a h-pattern box and it may be strong enough to handle the power but it will def hinder gear change capability.
Im kinda in the same boat but I already have a decent T5 box to use for now but in a few years of when/if my box let’s go I will be going sequential.
Why have a 750hp engine only for the transmission to hold it back...

Cheers Paul