What’s the best new high hp motor that will fit in a 72 Scamp?

Man I would not want to try and stuff a 4 cam Ford Modular motor between the shock towers of any Mopar they are bigger than Hemis
I could not even get a 4 cam or a 3 valve into a 93 Crown Vic ( they did put it in later Mercury Marauder but later chassis) (someone did do it in early chassis but a lot of work
I just ended upgrading to the "PI" heads and similar
is an awesome engine